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

This reverts commit 3582ebe06dc657873e2a5f72e777bf268b80bfd0.

Reason for revert: refresh done

Change-Id: Ic62ab76dcb1dcc27ecb46e306ec5ef4b73cfb1d2
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/84981
Reviewed-by: Chenglong Tang <chenglongtang@google.com>
Tested-by: Robert Kolchmeyer <rkolchmeyer@google.com>