feat(vector search): Add examples for streaming, endpoints, and deploy

[ericgribkoff]

Description

feat(vector search): Add examples for streaming, endpoints, and deploy

Checklist

Readiness

• Yes, merge this PR after it is approved
• No, don't merge this PR after it is approved

Style

• My sample follows the rules described for Terraform in the Effective Samples style guide
• My sample follows the other requirements and best practices in the Contributing
  guide

Testing

• I have performed tests described in the Contributing guide:

  • Tests pass: terraform apply
  • Lint pass: terraform fmt check

Intended location

• Yes, this sample will be (or already is) included on cloud.google.com
  Location(s):

• No, this sample won't be included on cloud.google.com
  Reason:

API enablement

• If the sample needs an API enabled to pass testing, I have added the service to the Test setup file

Review

• If this sample adds a new directory, I have added codeowners to the CODEOWNERS file

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• vertex_ai/index_endpoint/main.tf:18, tag aiplatform_create_index_endpoint_sample
• vertex_ai/index_endpoint_deploy/main.tf:18, tag aiplatform_deploy_index_endpoint_sample
• vertex_ai/index_streaming/main.tf:18, tag aiplatform_create_streaming_index_sample

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[iennae]

/gcbrun

[glasnt]

/gcbrun

[msampathkumar]

LGTM

[msampathkumar]

Test cases are passing! Approved the PR and added minor recommendations

CC: @ericgribkoff @glasnt

[glasnt]

/gcbrun