feat(vertexai): add the data source for Vertex AI Index

[shotarok]

Part of hashicorp/terraform-provider-google#12818
Part of hashicorp/terraform-provider-google#9298

Add the data source for vertex_ai_index.

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

google_vertex_ai_index

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[modular-magician]

Hello! I am a robot who works on Magic Modules PRs.

I've detected that you're a community contributor. @shuyama1, a repository maintainer, has been assigned to assist you and help review your changes.

❓ First time contributing? Click here for more details

---

Your assigned reviewer will help review your code by:

• Ensuring it's backwards compatible, covers common error cases, etc.
• Summarizing the change into a user-facing changelog note.
• Passes tests, either our "VCR" suite, a set of presubmit tests, or with manual test runs.

You can help make sure that review is quick by running local tests and ensuring they're passing in between each push you make to your PR's branch. Also, try to leave a comment with each push you make, as pushes generally don't generate emails.

If your reviewer doesn't get back to you within a week after your most recent change, please feel free to leave a comment on the issue asking them to take a look! In the absence of a dedicated review dashboard most maintainers manage their pending reviews through email, and those will sometimes get lost in their inbox.

---

[shotarok]

/gcbrun

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 3 files changed, 114 insertions(+))
Terraform Beta: Diff ( 3 files changed, 114 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2340
Passed tests 2090
Skipped tests: 244
Failed tests: 6

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccDataSourceVertexAIIndex_basic|TestAccDataSourceSqlDatabaseInstance_basic|TestAccLoggingBucketConfigProject_cmekSettings|TestAccSqlUser_postgres|TestAccSqlUser_postgresAbandon|TestAccSqlUser_postgresIAM

[modular-magician]

Tests passed during RECORDING mode:
TestAccDataSourceSqlDatabaseInstance_basic[Debug log]
TestAccLoggingBucketConfigProject_cmekSettings[Debug log]
TestAccSqlUser_postgres[Debug log]
TestAccSqlUser_postgresAbandon[Debug log]
TestAccSqlUser_postgresIAM[Debug log]

Tests failed during RECORDING mode:
TestAccDataSourceVertexAIIndex_basic[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 3 files changed, 122 insertions(+))
Terraform Beta: Diff ( 3 files changed, 122 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2355
Passed tests 2105
Skipped tests: 247
Failed tests: 3

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccDataSourceVertexAIIndex_basic|TestAccLoggingBucketConfigProject_cmekSettings|TestAccContainerCluster_withInvalidGatewayApiConfigChannel

[modular-magician]

Tests passed during RECORDING mode:
TestAccDataSourceVertexAIIndex_basic[Debug log]
TestAccLoggingBucketConfigProject_cmekSettings[Debug log]
TestAccContainerCluster_withInvalidGatewayApiConfigChannel[Debug log]

All tests passed
View the build log or the debug log for each test

[shotarok]

@shuyama1 Hello, all tests passed. Could you review this PR when you have time? Thanks!

[shuyama1]

Sorry, I'll be out this week. Assigning a new reviewer! Thanks @ScottSuarez!

[ScottSuarez]

Could you add documentation for this datasource? See other datasources like google_firebase_android_app for examples.

[gericdong]

@shotarok will you be available to add the documentation as suggested above? Please let us know. Thanks.

[shotarok]

@gericdong (CC: @ScottSuarez) Thank you for your heads up, and sorry about keeping this PR open for a long time. I added commits to update this PR based on the feedback.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 4 files changed, 148 insertions(+))
Terraform Beta: Diff ( 4 files changed, 148 insertions(+))

[modular-magician]

Tests analytics

Total tests: 0
Passed tests 0
Skipped tests: 0
Affected tests: 0

Errors occurred during REPLAYING mode. Please fix them to complete your PR
View the build log

[ScottSuarez]

Code is failing to compile
https://github.com/GoogleCloudPlatform/magic-modules/actions/runs/4985343009/jobs/8924828526

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 4 files changed, 151 insertions(+))
Terraform Beta: Diff ( 4 files changed, 151 insertions(+))
TF Conversion: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2742
Passed tests 2451
Skipped tests: 283
Affected tests: 8

Action taken

Found 8 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

TestAccComputeFirewallPolicyRule_multipleRules|TestAccAlloydbCluster_missingLocation|TestAccAlloydbBackup_missingLocation|TestAccApigeeKeystoresAliasesKeyCertFile_apigeeKeystoresAliasesKeyCertFileTestExample|TestAccApigeeKeystoresAliasesPkcs12_ApigeeKeystoresAliasesPkcs12Example|TestAccDataSourceGoogleFirebaseAndroidAppConfig|TestAccDataSourceAlloydbLocations_basic|TestAccLoggingBucketConfigProject_cmekSettings

Get to know how VCR tests work

[modular-magician]

Tests passed during RECORDING mode:
TestAccAlloydbCluster_missingLocation[Debug log]
TestAccAlloydbBackup_missingLocation[Debug log]
TestAccApigeeKeystoresAliasesKeyCertFile_apigeeKeystoresAliasesKeyCertFileTestExample[Debug log]
TestAccApigeeKeystoresAliasesPkcs12_ApigeeKeystoresAliasesPkcs12Example[Debug log]
TestAccDataSourceAlloydbLocations_basic[Debug log]
TestAccLoggingBucketConfigProject_cmekSettings[Debug log]

Tests failed during RECORDING mode:
TestAccComputeFirewallPolicyRule_multipleRules[Error message] [Debug log]
TestAccDataSourceGoogleFirebaseAndroidAppConfig[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[shotarok]

It looks like the two failed tests are not related to this PR, and they often fail in the other open PRs.

@ScottSuarez Could you give me your advice? Should we rerun the failed acceptance tests?

[ScottSuarez]

failures are non-blocking!