Create new user and group for arcvm_data_migrator

BUG=b:251764421
TEST=./display-accts.py --lint
TEST=With crrev.com/c/3932404, crrev.com/c/3963808 and
TEST=crrev.com/i/5048240, images built with build_image has
TEST=arcvm_data_migrator in /etc/{passwd,group}

Change-Id: I44cf3fb7ca2d21b57858333fd9ad2322b396e366
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/3960649
Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
Tested-by: Momoko Hattori <momohatt@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Commit-Queue: Momoko Hattori <momohatt@chromium.org>
2 files changed
tree: 17e7e7ee2666a8a8d83e0ce1fc71fd3f2541554f
  1. acct-group/
  2. acct-user/
  3. eclass/
  4. metadata/
  5. profiles/
  6. OWNERS
  7. PRESUBMIT.cfg