feat: Support this role in container builds

Feature: Support running the firewall role during container builds.

Reason: This is particularly useful for building bootc derivative OSes.

Result: These flags enable running the bootc container scenarios in CI,
which ensures that the role works in buildah build environment. This
allows us to officially support this role for image mode builds.

See https://issues.redhat.com/browse/RHEL-78157

Author: martinpitt

meta/main.yml

@@ -23,3 +23,4 @@ galaxy_info:
     - firewall
     - system
     - container
+    - containerbuild