[tripleo] hold rechecks content provider gate blocker - CentOS-9 stream mirrors

Hello All, We have a check/gate blocker impacting all CentOS-9 jobs. Details are in: https://bugs.launchpad.net/tripleo/+bug/2018265 - CentOS-9 stream mirrors are returning Status code: 404. Per https://review.opendev.org/868392 - the Rackspace mirrors are being used to sync CentOS-9 repos - so possibly there is a lag/roll back there. We will post out once there is a fix/workaround or if the situation gets unblocked dueto an update. Thank you.