## Background

#13337

We currently did not include the Tool Search tools exposed in the
anthropic provider for the vertex provider.

For this change to be added, we first needed to ensure we are not
passing the beta header since vertex rejects it.

## Summary

include the `toolSearchRegex_20251119` and `toolSearchBm25_20251119` in
`vertexAnthropicTools`

## Manual Verification

verified by running the examples: 
-
`examples/ai-functions/src/generate-text/google/vertex-anthropic-tool-search-regex.ts`
-
`examples/ai-functions/src/generate-text/google/vertex-anthropic-tool-search-bm25.ts`
-
`examples/ai-functions/src/generate-text/google/vertex-anthropic-tool-search-deferred-bm25.ts`

along with the streaming examples

## Checklist

- [x] Tests have been added / updated (for bug fixes / features)
- [ ] Documentation has been added / updated (for bug fixes / features)
- [x] A _patch_ changeset for relevant packages has been added (for bug
fixes / features - run `pnpm changeset` in the project root)
- [x] I have reviewed this pull request (self-review)

## Related Issues

Fixes #13337