Update IronBank BASE_IMAGE with ironbank prefix (#102720) (#102838)

This supports local testing.  It should not be included in
hardening_manifest.yml, which injects the scope at runtime.
# Conflicts:
#	distribution/docker/src/docker/Dockerfile

Co-authored-by: Jon <[email protected]>

Author: mark-vieira

distribution/docker/src/docker/Dockerfile

@@ -26,7 +26,7 @@
 ################################################################################
 
 ARG BASE_REGISTRY=registry1.dso.mil
-ARG BASE_IMAGE=redhat/ubi/ubi9
+ARG BASE_IMAGE=ironbank/redhat/ubi/ubi9
 ARG BASE_TAG=9.2
 
 FROM ${base_image} AS builder