update_chroot: move chroot version hooks to chromite

BUG=b:298249751
TEST=CQ passes

Cq-Depend: chromium:4835160
Change-Id: I35a77199c7c1d1c1021192368e2533d9aa858fa1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/4835119
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Tim Bain <tbain@google.com>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed