Promote resolve-subnet-mask field in Subnetwork resource to GA

[knparikh]

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

compute: promoted `resolve_subnet_field` field in `google_compute_subnetwork` resource to GA

[github-actions]

Googlers: For automatic test runs see go/terraform-auto-test-runs.

@ScottSuarez, a repository maintainer, has been assigned to review your changes. If you have not received review feedback within 2 business days, please leave a comment on this PR asking them to take a look.

You can help make sure that review is quick by doing a self-review and by running impacted tests locally.

[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.

google provider: Diff ( 4 files changed, 71 insertions(+), 3 deletions(-))
google-beta provider: Diff ( 2 files changed, 2 insertions(+), 6 deletions(-))
terraform-google-conversion: Diff ( 4 files changed, 25 insertions(+))
Open in Cloud Shell: Diff ( 4 files changed, 116 insertions(+))

[modular-magician]

Non-exercised tests

🔴 Tests were added that are GA-only additions and require manual runs:

• TestAccComputeSubnetwork_subnetworkResolveSubnetMaskExample

Tests analytics

Total tests: 1397
Passed tests: 1307
Skipped tests: 90
Affected tests: 0

Click here to see the affected service packages

• compute

🟢 All tests passed!

View the build log

[ScottSuarez]

stub for ga test
https://hashicorp.teamcity.com/buildConfiguration/TerraformProviders_GoogleCloud_GOOGLE_MMUPSTREAMTESTS_GOOGLE_PACKAGE_COMPUTE/635024