fix: onboarding libraries to Librarian / compute

[suztomo]

Summary

Onboards google-cloud-compute and google-cloud-compute-v1 from OwlBot to Librarian (v0.40.1-0.20260904160715-39fbb3f6fecb) using gapic-generator-cloud 0.52.0 (#36532).

Resolves:

• librarian#7452 (ruby: google-cloud-compute-v1)
• librarian#7461 (ruby: YARD documentation warning in google-cloud-compute)

See tracking spreadsheet: go/sdk-librarian-ruby-tracker

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Comparison & Diff Analysis vs. OwlBot PR #36350

Pull request #36350 is an open OwlBot PR containing two nested commits from googleapis:

1. Revision 20260807 (https://github.com/googleapis/googleapis/commit/32aa4089114a8fbbce1b090244aaf80c6b68f36f):
   • Adds ResourceMetadata, RegexRewrite, FutureReservationStoragePoolProvisionedCapacity, ASN rate-limit key types, etc.
   • Included in this PR: The googleapis commit pinned in librarian.yaml (00ff8fcb95cafbac573cc449b0d1a039244f1b4b) is an ancestor of 32aa4089114a. All proto definitions (lib/google/cloud/compute/v1/compute_pb.rb) and doc updates (proto_docs/google/cloud/compute/v1/compute.rb) from Revision 20260807 are included in this onboarding PR.
2. Revision 20260821 (https://github.com/googleapis/googleapis/commit/31daafc7af507fab68f0317a5b15a382ba2c3fda):
   • Adds ReservationSlots.GetHealth RPC (reservation_slots/rest/client.rb, service_stub.rb, reservation_slots_rest_test.rb), GetHealthOperationMetadata, and BMSAI confidential instance types.
   • Pending googleapis SHA Bump: Because 00ff8fcb95ca precedes 31daafc7af50, the Revision 20260821 additions are not yet present in librarian.yaml's pinned commit and will be automatically generated and released when sources.googleapis.commit is bumped (tracked under librarian#7386).

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Analysis of Code Diffs

Standard Expected Changes

• OwlBot Removal: Deleted .OwlBot.yaml, .owlbot-manifest.json, and custom .owlbot.rb scripts in google-cloud-compute and google-cloud-compute-v1.
• File Permissions: Standardized file permissions from 100755 to 100644 (librarian#7057).
• Library Metadata & Documentation Titles:
  • .yardopts, README.md, proto_docs/README.md, and gemspec titles/summaries updated to match google/cloud/compute/v1/compute_v1.yaml (Compute Engine API).

Generator & Librarian Improvements (Verified Behaviors)

• REST-Only Transport Proto Generation (librarian#7453):
  • In legacy runs, grpc_tools_ruby_protoc unconditionally generated compute_services_pb.rb (containing unused GRPC::GenericService stubs) for REST-only DIREGAPICs. With librarian#7453, --grpc_out is omitted for REST-only transports, so compute_services_pb.rb is cleanly omitted.
• Snippets Omission via delete_generation_output_paths (librarian#7506):
  • Replaces the legacy .owlbot.rb workaround (FileUtils.rm_rf File.join(OwlBot.staging_dir, "snippets")) with native delete_generation_output_paths: [snippets] configuration in librarian.yaml.
• YARD Formatting Fixes (gapic-generator-ruby#1337):
  • Replaces the legacy .owlbot.rb regex modifiers for multiline {...} braces and @pattern/@required tags with native gapic-generator-cloud 0.52.0 formatting.

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Local Verification

Ran toys ci --test --rubocop --doctest --yard across both gems:

• google-cloud-compute-v1:
  • Unit tests: 0 failures, 0 errors
  • RuboCop: 0 offenses
  • YARD (--fail-on-warning): 87.48% documented, 0 warnings, 0 errors
• google-cloud-compute:
  • Unit tests: 126 runs, 101 assertions, 0 failures, 0 errors
  • RuboCop: 4 files inspected, 0 offenses
  • YARD: 98.43% documented, 0 warnings, 0 errors

[suztomo]

The integration tests failed https://paste.googleplex.com/5970813774331904. Probably due to the environment set up is not yet done. The Kokoro job also failed in OwlBot's pull request in #36350.