Bump google.golang.org/grpc from 1.60.1 to 1.61.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.60.1 to 1.61.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.60.1...v1.61.0)

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

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

vendor/google.golang.org/grpc/reflection/serverreflection.go

@@ -176,11 +176,20 @@ type serverReflectionServer struct {
 // wire format ([]byte). The fileDescriptors will include fd and all the
 // transitive dependencies of fd with names not in sentFileDescriptors.
 func (s *serverReflectionServer) fileDescWithDependencies(fd protoreflect.FileDescriptor, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	if fd.IsPlaceholder() {
+		// If the given root file is a placeholder, treat it
+		// as missing instead of serializing it.
+		return nil, protoregistry.NotFound
+	}
 	var r [][]byte
 	queue := []protoreflect.FileDescriptor{fd}
 	for len(queue) > 0 {
 		currentfd := queue[0]
 		queue = queue[1:]
+		if currentfd.IsPlaceholder() {
+			// Skip any missing files in the dependency graph.
+			continue
+		}
 		if sent := sentFileDescriptors[currentfd.Path()]; len(r) == 0 || !sent {
 			sentFileDescriptors[currentfd.Path()] = true
 			fdProto := protodesc.ToFileDescriptorProto(currentfd)