Revert "Restrict access to release branch: release-R101 to LTS Refresher group."

This reverts commit d95c36443f1390853ee5e572dc83fa6a3167d3ee.

Reason for revert: need snapshotter to run

Change-Id: Ie5d788bde079b558f8302d13507acd432a16bd4e
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/64114
Tested-by: Sejal Sharma <sejalsharma@google.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>