qa/workunits/rados: enable crb and install generic package for c9
This workunit was still trying to enable
"codeready-builder-for-rhel-8-x86_64-rpms", which is a repo specific
to centos 8 stream. After changing the repo name, I found that there
is no libarchive-3.3.3 package available for centos 9 stream, so I
changed it to the generic version.
Fixes: https://tracker.ceph.com/issues/67562 Signed-off-by: Laura Flores <lflores@ibm.com>