feat!: Replace google-cloud-automl-v1 with a tombstone

[zhumin8]

Tombstone google-cloud-automl-v1 library as service is decommissioned (b/559286738).

[snippet-bot]

Here is the summary of changes.

You are about to delete 20 region tags.

• google-cloud-automl-v1/snippets/automl/create_dataset.rb:19, tag automl_v1_generated_AutoML_CreateDataset_sync
• google-cloud-automl-v1/snippets/automl/create_model.rb:19, tag automl_v1_generated_AutoML_CreateModel_sync
• google-cloud-automl-v1/snippets/automl/delete_dataset.rb:19, tag automl_v1_generated_AutoML_DeleteDataset_sync
• google-cloud-automl-v1/snippets/automl/delete_model.rb:19, tag automl_v1_generated_AutoML_DeleteModel_sync
• google-cloud-automl-v1/snippets/automl/deploy_model.rb:19, tag automl_v1_generated_AutoML_DeployModel_sync
• google-cloud-automl-v1/snippets/automl/export_data.rb:19, tag automl_v1_generated_AutoML_ExportData_sync
• google-cloud-automl-v1/snippets/automl/export_model.rb:19, tag automl_v1_generated_AutoML_ExportModel_sync
• google-cloud-automl-v1/snippets/automl/get_annotation_spec.rb:19, tag automl_v1_generated_AutoML_GetAnnotationSpec_sync
• google-cloud-automl-v1/snippets/automl/get_dataset.rb:19, tag automl_v1_generated_AutoML_GetDataset_sync
• google-cloud-automl-v1/snippets/automl/get_model.rb:19, tag automl_v1_generated_AutoML_GetModel_sync
• google-cloud-automl-v1/snippets/automl/get_model_evaluation.rb:19, tag automl_v1_generated_AutoML_GetModelEvaluation_sync
• google-cloud-automl-v1/snippets/automl/import_data.rb:19, tag automl_v1_generated_AutoML_ImportData_sync
• google-cloud-automl-v1/snippets/automl/list_datasets.rb:19, tag automl_v1_generated_AutoML_ListDatasets_sync
• google-cloud-automl-v1/snippets/automl/list_model_evaluations.rb:19, tag automl_v1_generated_AutoML_ListModelEvaluations_sync
• google-cloud-automl-v1/snippets/automl/list_models.rb:19, tag automl_v1_generated_AutoML_ListModels_sync
• google-cloud-automl-v1/snippets/automl/undeploy_model.rb:19, tag automl_v1_generated_AutoML_UndeployModel_sync
• google-cloud-automl-v1/snippets/automl/update_dataset.rb:19, tag automl_v1_generated_AutoML_UpdateDataset_sync
• google-cloud-automl-v1/snippets/automl/update_model.rb:19, tag automl_v1_generated_AutoML_UpdateModel_sync
• google-cloud-automl-v1/snippets/prediction_service/batch_predict.rb:19, tag automl_v1_generated_PredictionService_BatchPredict_sync
• google-cloud-automl-v1/snippets/prediction_service/predict.rb:19, tag automl_v1_generated_PredictionService_Predict_sync

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[quartzmo]

Thanks @zhumin! The tombstone files and gemspec build for google-cloud-automl-v1 look great.

Because #36592 just merged, librarian.yaml has a small merge conflict (both google-cloud-automl and google-cloud-automl-v1 should be removed). Could you rebase this branch onto latest main? Once rebased, I'll approve and merge!