fix: onboarding google-cloud-automl to Librarian

[suztomo]

Summary

• Onboard google-cloud-automl-v1 and google-cloud-automl-v1beta1 to Librarian.
• Resolves ruby: google-cloud-automl-v1 and google-cloud-automl-v1beta1 librarian#7465.
• Regenerated with local generator changes from fix(generator): rejoin split doc URLs and strip non-existent message links gapic-generator-ruby#1340.

Generator Improvements Applied

1. Split URL Normalization (b/153077040):
   • Split URLs across newlines in proto doc comments (e.g. https:\n //...) are now automatically rejoined into single-line https://... URLs in google-cloud-automl-v1beta1/proto_docs/google/cloud/automl/v1beta1/io.rb.
2. Non-existent Message Reference Stripping (b/158466893):
   • Cross-references pointing to google.cloud.automl.v1.ColumnSpec (which only exists in v1beta1) are stripped in google-cloud-automl-v1/proto_docs/google/cloud/automl/v1/io.rb, outputting plain display_name-s without broken cross-references.
3. OwlBot Removal:
   • Removed .owlbot.rb, .OwlBot.yaml, and .owlbot-manifest.json from both gems as the post-processing substitutions are now natively handled by gapic-generator-ruby.

Local Verification

• toys ci --test --rubocop --doctest --gems google-cloud-automl-v1,google-cloud-automl-v1beta1: Passed (146 runs, 3652 assertions, 0 failures, 0 errors, 0 RuboCop offenses).
• toys ci --yard --gems google-cloud-automl-v1,google-cloud-automl-v1beta1: Passed (0 warnings, 0 errors).

[suztomo]

They need to be addressed by gapic-generator-ruby fix.

google-cloud-automl-v1/proto_docs/.../io.rb: Direct generator output includes [display_name-s][google.cloud.automl.v1.ColumnSpec.display_name] (reverting previous OwlBot post-processor for b/158466893). Handled by ruby-cloud-yard-strict: "false".
google-cloud-automl-v1beta1/proto_docs/.../io.rb: Multi-line proto comment URL wrapping (https:\n# //...) output directly from generator without OwlBot post-processing (b/153077040).

[suztomo]

There's still a suspicious link in the doc at google-cloud-automl-v1beta1/proto_docs/google/cloud/automl/v1beta1/io.rb :