WHY
Addon instance will provide a way to notify addons that an uninstallation has occurred. We should account for this new uninstallation flow so that we are ready once this is available in production

WHAT
Integreatly operator should initiate a uninstallation flow folllowing:

• https://docs.google.com/document/d/1VbsGYxTWBxG4nsya9EMRykwFNLKRXNGUyyRg-Ab5aDc/edit#heading=h.tqisvjr9hekt

once a new version of addon operator is available that takes account these changes:

• https://github.com/openshift/addon-operator/pull/358

HOW

• In the new status controller provided by MGDAPI-5304, check for this markedForDeletion field to be true
• If true, delete the RHMI CR to initiate an uninstall
• Once uninstallation is complete, report a new status to the addon instance using the new condition to report that the addon is ready to be removed.
• Existing uninstallation logic should be kept until the migration of cluster service to addon service

TESTS

• Unit tests for the logic

DONE

• New uninstallation flow using addon instance is accounted for