e2e: reformat error message with proper error formatting
e2e: reformat error message with proper error formatting

To make the error return consistent across e2e tests we have decided
to remove `with error` presence from the logs and this commit
does that for rbd tests.

Signed-off-by: Humble Chirammal <dc8ba7e82a7df22725dedec9b10c7aaab9ec713f@redhat.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi