Do not spawn ironic-api on metal
Do not spawn ironic-api on metal

When removing ironic-server group [1] we have introduced bug, where
ironic-api started appearing on_metal.

[1] https://review.opendev.org/c/openstack/openstack-ansible/+/852182

Change-Id: I96f29dba4874005a78a844c8909ff39052cca636

openstack/openstack-ansible,openstack/openstack-ansible