Fix Error 500s with anonymous clones for a project that has moved
We use a custom Redis key to post a redirect message for specific users, but for anonymous clones this fails because there is no id
associated with it.
For now, disable redirect messages for anonymous clone since they will never see them since there is no associated user ID in the post_receive endpoint.
Closes #41457 (closed)
/cc: @mayra-cabrera, @DouweM
Edited by Stan Hu