[telemetry] Fixes for Cloud Storage.
[telemetry] Fixes for Cloud Storage.

- Update gsutil output parsing for new versions and for some new errors we've seen.
- Pass the --bypass_prodaccess flag for the gsutil in depot_tools.


BUG=326313
TEST=Ran some benchmarks.

Review URL: https://codereview.chromium.org/118383002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@241666 0039d316-1c4b-4281-b951-d872f2087c98

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