kms_key_name parameter for google_dataflow_job resource

[AliAllomani]

added optional kms_key_name parameter for google_dataflow_job resource

Fixes hashicorp/terraform-provider-google#8062

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• 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)

dataflow: Added optional `kms_key_name` field for `google_dataflow_job`

[AliAllomani]

Acc Test

# make testacc TEST=./google TESTARGS='-run=TestAccDataflowJob_withKmsKey'
==> Checking source code against gofmt...
==> Checking that code complies with gofmt requirements...
go generate  ./...
TF_ACC=1 TF_SCHEMA_PANIC_ON_ERROR=1 go test ./google -v -run=TestAccDataflowJob_withKmsKey -timeout 240m -ldflags="-X=github.com/hashicorp/terraform-provider-google/version.ProviderVersion=acc"
=== RUN   TestAccDataflowJob_withKmsKey
=== PAUSE TestAccDataflowJob_withKmsKey
=== CONT  TestAccDataflowJob_withKmsKey
--- PASS: TestAccDataflowJob_withKmsKey (201.40s)
PASS
ok      github.com/hashicorp/terraform-provider-google/v3/google        202.593s

[modular-magician]

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

I have detected that you are a community contributor, so your PR will be assigned to someone with a commit-bit on this repo for initial review.

Thanks for your contribution! A human will be with you soon.

@c2thorn, please review this PR or find an appropriate assignee.

[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, 89 insertions(+))
Terraform Beta: Diff ( 3 files changed, 89 insertions(+))

[c2thorn]

LGTM, thanks for the contribution!
I'll run some tests and merge if all is well.

[c2thorn]

/gcbrun

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=165419"

[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, 89 insertions(+))
Terraform Beta: Diff ( 4 files changed, 90 insertions(+), 1 deletion(-))

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDataSourceGoogleSubnetwork|TestAccDataSourceStorageBucketObjectContent_Basic|TestAccActiveDirectoryDomainTrust_activeDirectoryDomainTrustBasicExample|TestAccContainerCluster_withConfidentialNodes|TestAccContainerCluster_withPrivateClusterConfigMissingCidrBlock|TestAccDataprocJob_Spark You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=165427"