build(deps): bump grpc version to 1.58.0 and protobuf to 3.24.0

[mpeddada1]

Notable changes in this PR:

• Upgrade of protobuf to 3.24.0.
• Upgrade of grpc to 1.58.0.
• Upgrade of errorprone to 2.20.0.
• Re-generation of showcase golden files with new versions of protobuf and grpc.
• Pinned GA job for BOM validation to commit sha of chore: ignore grpc-binder and grpc-cronet in bom validation java-cloud-bom#6191 (which ignores grpc-binder, grpc-cronet and grpc-android).
• Modified the GA job for downstream testing to use HEAD of google-cloud-java to account for changes in chore: refactor ITKmsTest to avoid using deprecated method google-cloud-java#9854

cc/ @suztomo