Cherry-pick from 'azure/marijadukic/secure-containers-supply-chain-wellbore' into 'm12-master'

ADO work item: Securing the containers supply chain - Wellbore

Migrate python image to use MCR

See merge request !587 (merged)

(cherry picked from commit d1c1eddd)

76c57d5f Added new Dockerfile for azure with python image from MCR d7ea1745 updated code comments 29eb4cab Updated NOTICE and azure_test_py job in pipeline to use python image from MCR 4c13fe8d added retry on failed flaky tests 961b40d6 Merge branch 'master' of...