Promote Vector Search 2.0 Collection to GA

[kkanska]

This PR introduces promotes the Vector Search Collection resource to GA. This allows users to manage Vector Search Collections declaratively using Terraform via v1 API.

API reference: https://docs.cloud.google.com/vertex-ai/docs/vectorsearch/reference/rest/v1/projects.locations.collections/create

`google_vector_search_collection` (ga)

[github-actions]

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

@SirGitsalot, 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.

[kkanska]

I've completed go/fix-missing-service-labels when I introduced the beta version of the resource.

[kkanska]

Logs of local test run in GA:

$ make testacc TEST=./google/services/vectorsearch TESTARGS='-run=TestAccVectorSearchCollection'
sh -c "'/usr/local/google/home/kkanska/.gvm/pkgsets/go1.24/global/src/github.com/hashicorp/terraform-provider-google/scripts/gofmtcheck.sh'"
==> Checking that code complies with gofmt requirements...
go vet
TF_ACC_REFRESH_AFTER_APPLY=1 TF_ACC=1 TF_SCHEMA_PANIC_ON_ERROR=1 go test ./google/services/vectorsearch -v -run=TestAccVectorSearchCollection -timeout 240m -ldflags="-X=github.com/hashicorp/terraform-provider-google/version.ProviderVersion=acc"
=== RUN   TestAccVectorSearchCollection_vectorsearchCollectionBasicExample
=== PAUSE TestAccVectorSearchCollection_vectorsearchCollectionBasicExample
=== RUN   TestAccVectorSearchCollection_update
=== PAUSE TestAccVectorSearchCollection_update
=== CONT  TestAccVectorSearchCollection_vectorsearchCollectionBasicExample
=== CONT  TestAccVectorSearchCollection_update
--- PASS: TestAccVectorSearchCollection_vectorsearchCollectionBasicExample (32.89s)
--- PASS: TestAccVectorSearchCollection_update (40.97s)
PASS
ok  	github.com/hashicorp/terraform-provider-google/google/services/vectorsearch	41.119s

[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 ( 14 files changed, 1688 insertions(+), 7 deletions(-))
google-beta provider: Diff ( 3 files changed, 3 insertions(+), 13 deletions(-))
terraform-google-conversion: Diff ( 2 files changed, 15 insertions(+))

[modular-magician]

Non-exercised tests

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

• TestAccVectorSearchCollection_update
• TestAccVectorSearchCollection_vectorsearchCollectionBasicExample

Tests analytics

Total tests: 2
Passed tests: 2
Skipped tests: 0
Affected tests: 0

Click here to see the affected service packages

• vectorsearch

🟢 All tests passed!

View the build log

[SirGitsalot]

Ran the new GA tests on TeamCity and they passed.

For future reference, here's the original PR and the revert PR.