Revert "Restrict access to release branch: release-R101 to LTS Refresher group."

This reverts commit 76be69ab5c5f5d908c3116ae0730f3adb326d15f.

Reason for revert: LTS refresh merge is done

Change-Id: I5056d89bd1acb40fbf1ab7dae22a608a07dec0f8
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/70410
Tested-by: Sejal Sharma <sejalsharma@google.com>
Reviewed-by: Sejal Sharma <sejalsharma@google.com>
Tested-by: He Gao <hegao@google.com>