rebase: bump google.golang.org/grpc from 1.59.0 to 1.60.1

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.59.0 to 1.60.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.59.0...v1.60.1)

---
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/internal/channelz/funcs.go

@@ -31,6 +31,7 @@ import (
 	"time"
 
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal"
 )
 
 const (
@@ -58,6 +59,12 @@ func TurnOn() {
 	}
 }
 
+func init() {
+	internal.ChannelzTurnOffForTesting = func() {
+		atomic.StoreInt32(&curState, 0)
+	}
+}
+
 // IsOn returns whether channelz data collection is on.
 func IsOn() bool {
 	return atomic.LoadInt32(&curState) == 1