* [POC] New-Style Upgrade Tests

SharedResource:
- Added the ability to validate the result of a given action function via an action_validator function.
- Made an improvement to exiting under error conditions that improved
  tracking file cleanup.

New directory for new-style upgrades located at tests/new_upgrades. This
will help to keep changes isolated from the existing upgrade tests.

new_upgrades/conftest:
- Removed the requirement for all upgrade tests to be marked as pre/post
- Introduced fixtures that coordinate checkout/checkin actions between
  multiple xdist workers.
- Introduced a fixture that performs an upgrade on a target satellite
- Introduced a fixture that is used for two test conversions in
  different modules.

test conversions:
- test_cv_upgrade_scenario and test_scenario_custom_repo_check converted
- pre-upgrade tests are now pre-upgrade fixtures that perform setup and
  yield their data in Box objects instead of saving to disk
- post-upgrade tests can now directly access the setup objects by
  inheriting the pre-upgrade fixture results

* Get test_cv_upgrade_scenario into passing state

* Get test_scenario_custom_repo_check into passing state

* Revert hard-coded setting in conftest

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Co-authored-by: synkd <dsynk@redhat.com>
Co-authored-by: synkd <48261305+synkd@users.noreply.github.com>
(cherry picked from commit e345285)

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