Add SQL Server Audit Config

[priyam1011]

Fixes: hashicorp/terraform-provider-google#11932

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)

sql: added `sql_server_audit_config` field in `google_sql_database_instance`

[modular-magician]

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[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

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]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

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: 2054
Passed tests 1825
Skipped tests: 226
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

TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withAddons|TestAccSqlDatabaseInstance_SqlServerAuditConfig

[modular-magician]

Tests failed during RECORDING mode:
TestAccContainerCluster_withAddons[view]
TestAccSqlDatabaseInstance_SqlServerAuditConfig[view]
TestAccContainerCluster_withConfidentialNodes[view]

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

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 3 files changed, 139 insertions(+))
Terraform Beta: Diff ( 3 files changed, 139 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2054
Passed tests 1824
Skipped tests: 226
Failed tests: 4

Action taken

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

TestAccSqlDatabaseInstance_SqlServerAuditConfig|TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withAddons|TestAccFirebaserulesRelease_BasicRelease

[modular-magician]

Tests passed during RECORDING mode:
TestAccSqlDatabaseInstance_SqlServerAuditConfig[view]
TestAccFirebaserulesRelease_BasicRelease[view]

Tests failed during RECORDING mode:
TestAccContainerCluster_withAddons[view]
TestAccContainerCluster_withConfidentialNodes[view]

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

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 3 files changed, 153 insertions(+))
Terraform Beta: Diff ( 3 files changed, 153 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2054
Passed tests 1824
Skipped tests: 226
Failed tests: 4

Action taken

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

TestAccFirebaserulesRelease_BasicRelease|TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withAddons|TestAccSqlDatabaseInstance_SqlServerAuditConfig

[modular-magician]

Tests passed during RECORDING mode:
TestAccSqlDatabaseInstance_SqlServerAuditConfig[view]
TestAccFirebaserulesRelease_BasicRelease[view]

Tests failed during RECORDING mode:
TestAccContainerCluster_withAddons[view]
TestAccContainerCluster_withConfidentialNodes[view]

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

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 3 files changed, 153 insertions(+))
Terraform Beta: Diff ( 3 files changed, 153 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2054
Passed tests 1825
Skipped tests: 226
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

TestAccFirebaserulesRelease_BasicRelease|TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withAddons

[modular-magician]

Tests passed during RECORDING mode:
TestAccFirebaserulesRelease_BasicRelease[view]

Tests failed during RECORDING mode:
TestAccContainerCluster_withAddons[view]
TestAccContainerCluster_withConfidentialNodes[view]

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