chore: update librarian to v0.32.0

[sofisl]

The changes in this PR are:

• librarian.yaml
• protos.json and protos.d.ts files: Every single protocol buffer definition file in the repository was regenerated to include the new Protobuf "Editions" metadata (like EDITION_2026 and feature_support fields) that the newer Librarian/protoc toolchain now outputs.
• .repo-metadata.json files: Minor auto-formatting or field updates from the new generator.

Note to reviewers:

• No new APIs or business logic are introduced in this PR (the upstream googleapis commit was left unchanged).
• Please do not try to read the full diff.
• To review, please verify the version bump in librarian.yaml and rely on our CI test suite to ensure the generated code is stable.
  Commands to verify locally:

# See the only manual change
git diff origin/main...HEAD librarian.yaml
# See a sample of the auto-generated structural changes
git diff origin/main...HEAD packages/google-maps-solar


I also ran `git diff origin/main...HEAD --name-only | grep -E '(^|/)src/'` to see if anything in src/ was changed, which it wasn't, which means the outputted code should be unchanged.

[gemini-code-assist]

Code Review

This pull request updates the generated protocol buffer definitions across multiple packages to incorporate new features, including batching configurations, naming styles, proto limits, and support for newer editions (such as EDITION_2026 and EDITION_UNSTABLE). It also updates ListOperations requests/responses, adds load balancing policies to backend rules, and bumps the librarian version to v0.32.0. Since there are no review comments, I have no feedback to provide.