chore(all): auto-regenerate .pb.go files

This is an auto-generated regeneration of the .pb.go files by
cloud.google.com/go/internal/gapicgen. Once this PR is submitted, genbot will
update the corresponding PR to depend on the newer version of go-genproto, and
assign reviewers. Whilst this or any regen PR is open in go-genproto, genbot
will not create any more regeneration PRs. If all regen PRs are closed,
gapicgen will create a new set of regeneration PRs once per night.

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Corresponding google-cloud-go PR: googleapis/google-cloud-go#5893

Changes:

Synchronize new proto/yaml changes.
  PiperOrigin-RevId: 441804088
  Source-Link: googleapis/googleapis@004b289

chore(bazel): update gapic-generator-csharp to v1.3.18
  PiperOrigin-RevId: 441714256
  Source-Link: googleapis/googleapis@78dd5ed

chore(bazel): update gapic-generator-go v0.28.0
  Changes include:
  - regapic automatic header injection
  - regapic gax.WithPath override support
  - regapic handle url.Parse errors

  PiperOrigin-RevId: 441620093
  Source-Link: googleapis/googleapis@ccffe23

feat(aiplatform): add reserved_ip_ranges to CustomJobSpec in aiplatform v1 custom_job.proto feat: add nfs_mounts to WorkPoolSpec in aiplatform v1 custom_job.proto feat: add JOB_STATE_UPDATING to JobState in aiplatform v1 job_state.proto feat: add MfsMount in aiplatform v1 machine_resources.proto feat: add ConvexAutomatedStoppingSpec to StudySpec in aiplatform v1 study.proto
  BREAKING CHANGE: (php) remove several `REQUIRED` field annotations in featurestore.proto, metadata.proto, and pipeline_job.proto

  PiperOrigin-RevId: 441616654
  Source-Link: googleapis/googleapis@a476b9f

chore: regenerate API index

  Source-Link: googleapis/googleapis@e5debc9

feat(aiplatform)!: rename Similarity to Examples, and similarity to examples in ExplanationParameters in aiplatform v1beta1 explanation.proto feat: add reserved_ip_ranges to CustomJobSpec in aiplatform v1beta1 custom_job.proto feat: add nfs_mounts to WorkPoolSpec in aiplatform v1beta1 custom_job.proto feat: add PredictRequestResponseLoggingConfig to aiplatform v1beta1 endpoint.proto feat: add model_version_id to DeployedModel in aiplatform v1beta1 endpoint.proto feat: add JOB_STATE_UPDATING to JobState in aiplatform v1beta1 job_state.proto feat: add MfsMount in aiplatform v1beta1 machine_resources.proto feat: add version_id to Model in aiplatform v1beta1 model.proto feat: add LatestMonitoringPipelineMetadata to ModelDeploymentMonitoringJob in aiplatform v1beta1 model_deployment_monitoring_job.proto feat: add ListModelVersion, DeleteModelVersion, and MergeVersionAliases rpcs to aiplatform v1beta1 model_service.proto feat: add model_version_id to UploadModelRequest and UploadModelResponse in aiplatform v1beta1 model_service.proto feat: add model_version_id to PredictResponse in aiplatform v1beta1 prediction_service.proto feat: add ConvexAutomatedStoppingSpec to StudySpec in aiplatform v1beta1 study.proto feat: add model_id and parent_model to TrainingPipeline in aiplatform v1beta1 training_pipeline.proto
  BREAKING CHANGE: (php) remove several `REQUIRED` field annotations in featurestore.proto, metadata.proto, and pipeline_job.proto

  PiperOrigin-RevId: 441615103
  Source-Link: googleapis/googleapis@2ce1c56

feat: Add field `check_preceding_lifecycle_events_present` to PublishBuildToolEventStreamRequest and PublishLifecycleEventRequest proto messages
  PiperOrigin-RevId: 441557687
  Source-Link: googleapis/googleapis@a877d3d

chore: use gapic-generator-python 0.65.1
  PiperOrigin-RevId: 441524537
  Source-Link: googleapis/googleapis@2a27391