Restrict sticky approvals to ldap/eng. Bug: 375498541 Change-Id: I8ab28741a4bed046aad9f43c6a5b32077b19a933 Reviewed-on: https://boringssl-review.googlesource.com/c/All-Projects/+/72927 Reviewed-by: Adam Langley <agl@google.com> Reviewed-by: Joey Scarr <jsca@google.com> Commit-Queue: Andrew Mitchell <mitchella@google.com>