Default to arm64 cipd packages on arm macs
Default to arm64 cipd packages on arm macs

Enough works in that config that it seems like a better default by now.
Checking out, building, and uploading patches works (but uploading still
requires `--bypass-hooks` for now until crbug.com/1205263 is fixed).

(In case something important I'm not aware of breaks, we can revert this.)

Bug: 1103236,1205263
Change-Id: Id432ffd4ab19b15c019614953a2cefa787b46225
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2896468
Reviewed-by: Dirk Pranke <6693ee08b084bb2ffa767f664c99b689395e0e4b@google.com>
Commit-Queue: Nico Weber <c0f02d98506190746d1cdcb01be0f37b51e27077@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools