Delete Old Docker Images in private docker registry

As we create and push the docker image into Artifactory, we should create a process to delete them. The process can be part of the test job itself or it can be a separate job.

https://jfrog.com/knowledge-base/artifactory-how-to-delete-old-docker-images/
https://jfrog.com/knowledge-base/artifactory-how-to-delete-specific-docker-images-based-on-name-and-patterns-from-artifactory/

Start by reviewing the test job that creates and pushes images, then read the two linked Artifactory guides. Determine whether cleanup belongs in that test job or a separate job; done means old Docker images are automatically deleted from the private registry.

Written by the indexing model from the issue text.