devtools/vcloud: Fix warning from underlying gcloud command
devtools/vcloud: Fix warning from underlying gcloud command

Fix the warning that said:
WARNING: Lists should be separated by commas, try "--scopes=storage-full,logging-write". If you intend to use logging-write for positional arguments, put them before the flag.

Change-Id: Ib42fddc75217733592c2950a41e695a98c32094c

vanadium/go.devtools,vanadium/go.devtools,vanadium/go.devtools