Manual push of images is required when a custom server image and an extension JDBC image are configured

When the KieApp instance contains one server configuration to pull a custom image like:
...
imageRegistry:
registry: quay.io
...
image: rhpam-kieserver-rhel8-custom
imageContext: dmartino
imageTag: 7.11.0-4
and also an extension JDBC image like:
...
build:
extensionImageStreamTag: 'jboss-kie-mssql-extension-openshift-image:7.2.2.jre11'
...

The operator does not create the aggregated image including all the custom components.
A manual push on the OpenShift namespace of both the custom image and the extension JDBC image are required, and the KieApp configuration must be adapted to this change.