Bump github.com/prometheus/client_golang from 1.14.0 to 1.15.1

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.14.0 to 1.15.1.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.14.0...v1.15.1)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/google.golang.org/protobuf/internal/impl/convert.go

@@ -59,7 +59,6 @@ func NewConverter(t reflect.Type, fd protoreflect.FieldDescriptor) Converter {
 	default:
 		return newSingularConverter(t, fd)
 	}
-	panic(fmt.Sprintf("invalid Go type %v for field %v", t, fd.FullName()))
 }
 
 var (