There are other retries (e.g. in git wrapper, gclient_scm) so we
shouldn't be retrying that much in gclient_utils.

In ideal case, we have a dedicated place where retries are determined,
and we make a retry decision based on stderr / exit code.

R=jojwang@google.com

Bug: 1359109
Change-Id: I97daa0d991a7294635e54b7a3d85a349c03c04c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3871979
Commit-Queue: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Joanna Wang <jojwang@chromium.org>