refs https://github.com/TryGhost/Ghost/issues/14101
- we have ~1000 linter warnings from historic code that is awaiting transforms as part of the Ember Octane migration
- the warning delay time of 30 days is too short, we keep hitting it because work on the migration has stalled
- keeping the linting errors in place is useful because the rules are useful for new code and the todo file helps track migration progress
- increased the ignore->warn decay time to 120 days, with a warn->fail time of 60 days after that giving us some time to clear up any remaining issues or add them back to the ignore list before builds start failing
