Add ironic-novncproxy container image

This is similar to nova-novncproxy except it includes package
openstack-ironic-novncproxy which has existed for 7 months.

Jira: OSPRH-20211

Author: steveb

container-images/tcib/base/os/ironic-base/ironic-novncproxy/ironic-novncproxy.yaml

@@ -0,0 +1,7 @@
+tcib_actions:
+- run: dnf -y install {{ tcib_packages['common'] | join(' ') }} && dnf clean all && rm -rf /var/cache/dnf
+tcib_packages:
+  common:
+  - novnc
+  - openstack-ironic-novncproxy
+tcib_user: ironic