ipa-replica-install: --setup-ca and *-cert-file are mutually exclusive
ipa-replica-install currently accepts both --setup-ca and *-cert-file
even though the options should be mutually exclusive (either install
CA-less with *-cert-file options or with a CA).
Add a check enforcing the options are mutually exclusive.
Fixes: https://pagure.io/freeipa/issue/8366
Reviewed-By: Rob Crittenden <rcritten@redhat.com>