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

This reverts commit 1027dfb8035d64918b98b7b0f57aa54523b840fd.

Reason for revert: LTS refresh merge done

Change-Id: I6fed536b6dcb17f541c5319c40b6d4494bc1adf6
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/59224
Tested-by: He Gao <hegao@google.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>