Update GCS storage library to support GetObject API on gzipped objects (#6506)

Fixes #6280

vendor/cloud.google.com/go/storage/go17.go

@@ -1,4 +1,4 @@
-// Copyright 2017 Google Inc. All Rights Reserved.
+// Copyright 2017 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -24,3 +24,7 @@ import (
 func withContext(r *http.Request, ctx context.Context) *http.Request {
 	return r.WithContext(ctx)
 }
+
+func goHTTPUncompressed(res *http.Response) bool {
+	return res.Uncompressed
+}