chromite: add missing chroot field to various

All of the protobufs that need a chroot to operate should provide one.

BUG=b:187787264
TEST=generate

Change-Id: I95e70120b1caf965c4ee3bc92c380b19243c77d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2907417
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
6 files changed