Revert "Restrict access to release branch: release-R109 to LTS Refresher group."

This reverts commit 904b8e41df9f11a6ed7a7162df28af3963c94ce7.

Reason for revert: LTS 109 re-open

Change-Id: I8bd5ccd68c5d4499273023c1408f232744574059
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/69632
Reviewed-by: Miri Amarilio <mirilio@google.com>
Tested-by: Sejal Sharma <sejalsharma@google.com>