Allow prodaccess based gsutil to also write into a bucket
Allow prodaccess based gsutil to also write into a bucket

The Telemetry workflow happily uses this gsutil to download artifacts, but they would also like to use the same workflow to upload artifacts.

I don't see a big harm in enabling read_write access for prodaccess based gsutil since its already more restrictive than the normal gsutil auth flow.  I could also be convinced to make this full_control, but that need has not arisen yet.

BUG= 341665

Review URL: https://codereview.chromium.org/148203012

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@259761 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools