[Enhancement]: CI E2E tests on embedded ostree container images

[husky-parul]

Design Document Link

PR: #

What would you like to be added:

• Rpm: create rpm repo for .tar which are only updated after a rebase
• containerized: upload .tar to a github repo
• write CI e2e tests for Image Loader

Why is this needed:

[openshift-bot]

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[dhellmann]

This is being tracked in Jira as part of USHIFT-228