Interrupting is reported with exit_code 1 in metrics and makes it harder
to determine if a user canceled git cl.
Change-Id: I99f35378dcf02cffa39a05317651fcd2c6a0b520
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4684512
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Gavin Mak <gavinmak@google.com>