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

This reverts commit 9dc1ad742c786c200819dd8458d5bbbf251b6bca.

Reason for revert: lts refresh done

Change-Id: I0008eeec401b6faab34a2335b7aa286c9b42780b
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/83821
Tested-by: Nandhini Rengaraj <nrengaraj@google.com>
Reviewed-by: Chenglong Tang <chenglongtang@google.com>