tests: adds a 'rhcs-' prefix to the testing scenarios matrix
tests: adds a 'rhcs-' prefix to the testing scenarios matrix

This allows for us to have a copy of the existing testing scenarios with
a 'rhcs-' prefix. We can use that in the tox.ini to take actions we need
to properly test Red Hat Ceph Storage.

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

font/ceph-ansible,albertomurillo/ceph-ansible,jtaleric/ceph-ansible,fgal/ceph-ansible,font/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,WingkaiHo/ceph-ansible,travmi/ceph-ansible,ceph/ceph-ansible,travmi/ceph-ansible,WingkaiHo/ceph-ansible,bengland2/ceph-ansible,albertomurillo/ceph-ansible,WingkaiHo/ceph-ansible,jtaleric/ceph-ansible,bengland2/ceph-ansible,albertomurillo/ceph-ansible