java: aiplatform diff due to google-cloud-java generation issue

[zhumin8]

librarian generate aiplatform is producing diffs again, need investigation

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   java-aiplatform/README.md
        modified:   java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/gapic_metadata.json
        modified:   java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/package-info.java
        modified:   java-aiplatform/google-cloud-aiplatform/src/main/resources/META-INF/native-image/com.google.cloud.aiplatform.v1beta1/reflect-config.json
        modified:   java-aiplatform/google-cloud-aiplatform/src/test/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineServiceClientTest.java
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngine.java
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineExecutionServiceProto.java
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineOrBuilder.java
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineProto.java
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/proto/google/cloud/aiplatform/v1beta1/reasoning_engine.proto
        modified:   java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/proto/google/cloud/aiplatform/v1beta1/reasoning_engine_execution_service.proto
        modified:   librarian.yaml

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionServiceClient.java
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionServiceSettings.java
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/stub/GrpcReasoningEngineRuntimeRevisionServiceCallableFactory.java
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/stub/GrpcReasoningEngineRuntimeRevisionServiceStub.java
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/stub/ReasoningEngineRuntimeRevisionServiceStub.java
        java-aiplatform/google-cloud-aiplatform/src/main/java/com/google/cloud/aiplatform/v1beta1/stub/ReasoningEngineRuntimeRevisionServiceStubSettings.java
        java-aiplatform/google-cloud-aiplatform/src/test/java/com/google/cloud/aiplatform/v1beta1/MockReasoningEngineRuntimeRevisionService.java
        java-aiplatform/google-cloud-aiplatform/src/test/java/com/google/cloud/aiplatform/v1beta1/MockReasoningEngineRuntimeRevisionServiceImpl.java
        java-aiplatform/google-cloud-aiplatform/src/test/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionServiceClientTest.java
        java-aiplatform/grpc-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionServiceGrpc.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/DeleteReasoningEngineRuntimeRevisionOperationMetadata.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/DeleteReasoningEngineRuntimeRevisionOperationMetadataOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/DeleteReasoningEngineRuntimeRevisionRequest.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/DeleteReasoningEngineRuntimeRevisionRequestOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/GetReasoningEngineRuntimeRevisionRequest.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/GetReasoningEngineRuntimeRevisionRequestOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ListReasoningEngineRuntimeRevisionsRequest.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ListReasoningEngineRuntimeRevisionsRequestOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ListReasoningEngineRuntimeRevisionsResponse.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ListReasoningEngineRuntimeRevisionsResponseOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevision.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionName.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionOrBuilder.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionProto.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/java/com/google/cloud/aiplatform/v1beta1/ReasoningEngineRuntimeRevisionServiceProto.java
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/proto/google/cloud/aiplatform/v1beta1/reasoning_engine_runtime_revision.proto
        java-aiplatform/proto-google-cloud-aiplatform-v1beta1/src/main/proto/google/cloud/aiplatform/v1beta1/reasoning_engine_runtime_revision_service.proto
        java-aiplatform/samples/snippets/generated/com/google/cloud/aiplatform/v1beta1/reasoningengineruntimerevisionservice/
        java-aiplatform/samples/snippets/generated/com/google/cloud/aiplatform/v1beta1/reasoningengineruntimerevisionservicesettings/
        java-aiplatform/samples/snippets/generated/com/google/cloud/aiplatform/v1beta1/stub/reasoningengineruntimerevisionservicestubsettings/

[zhumin8]

Actually, I think the reason is here googleapis/google-cloud-java#13165 (comment)

The generation PR in google-cloud-java failed to include code changes, but only updated googleapis_commitish

The change included "feat: [aiplatform] add ReasoningEngineRuntimeRevisionService and update related fields in ReasoningEngine"

[zhumin8]

Merging googleapis/google-cloud-java#13175 should fix this.

[zhumin8]

For same reason, expect generation diffs in vectorsearch, dataproc, spanner

[zhumin8]

Verified after googleapis/google-cloud-java#13188.
aiplatform, vectorsearch, dataproc don't have diffs. spanner has diff, tracked separately #6011