With this, it's possible to run some things without

  export VPYTHON_BYPASS="manually managed python not supported by chrome operations"

on an arm mac, such as `git cl upload` -- this CL was uploaded
from my M1 MBP :)

(Presubmits need py2 which we don't have yet, but with
`--bypass-hooks` it works.)

Bug: 1103326,1184767,1103236
Change-Id: I46f5b880dfd72b8d811d39b43311fdee17ccad3e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2858534
Commit-Queue: Dirk Pranke <dpranke@google.com>
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>