* fix: remove synchronization with mailman2
* feat: manage non wg mailing lists explicitly
* chore: black
* fix: update tests for new nonwg view
* feat: drop unused models
* chore: Use codespell to fix typos in code.
Second part of replacement of #4651
@rjsparks, I probably need to revert some things here, and I also
still need to add that new migration - how do I do that?
* Revert migrations
* Migrate "Whitelisted" to "Allowlisted"
* TEST_COVERAGE_MASTER_FILE -> TEST_COVERAGE_MAIN_FILE
* Fix permissions
* Add suggestions from @jennifer-richards