rebase: bump google.golang.org/grpc from 1.66.0 to 1.66.2

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.66.0 to 1.66.2.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.66.0...v1.66.2)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/grpc/server.go

@@ -1359,6 +1359,7 @@ func (s *Server) processUnaryRPC(ctx context.Context, t transport.ServerTranspor
 		}
 		return err
 	}
+	defer d.Free()
 	if channelz.IsOn() {
 		t.IncrMsgRecv()
 	}