rebase: bump google.golang.org/grpc from 1.68.1 to 1.69.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.68.1 to 1.69.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.68.1...v1.69.0)

---
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/go.opentelemetry.io/otel/codes/codes.go

@@ -83,7 +83,7 @@ func (c *Code) UnmarshalJSON(b []byte) error {
 				return fmt.Errorf("invalid code: %q", ci)
 			}
 
-			*c = Code(ci)
+			*c = Code(ci) // nolint: gosec  // Bit size of 32 check above.
 			return nil
 		}
 		return fmt.Errorf("invalid code: %q", string(b))