Revert "Restrict access to release branch: release-R117 to LTS Refresher group."

This reverts commit 9a73dfa97e342a549fa28653edfd2d818d6ca814.

Reason for revert: refresh done

Change-Id: I78ee62e40d6b523a12edde5e791b5aad510a2481
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/107397
Reviewed-by: Chenglong Tang <chenglongtang@google.com>
Tested-by: He Gao <hegao@google.com>