cephfs: add ceph-fuse suport for ceph-fuse

cephfs: add ceph-fuse suport for ceph-fuse

Currently tests in xfstests-dev can be executed against CephFS only by
mounting CephFS using kernel driver. Attempting to run tests against
CephFS using FUSE doesn't work because xfstests-dev would remount CephFS
using kernel. This patch adds the ability for xfstest-dev code to mount
CephFS using FUSE.

[Zorro add missed ";;" in common/rc]

Fixes: https://tracker.ceph.com/issues/55354
Signed-off-by: Rishabh Dave <ridave@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>