Don't remove mailer layouts files
Fix Sidekiq ActiveJob integration setup

* .connect on a Redis connection wasn't valid
* Reset logger after we're done testing for redis connection to avoid
  "closed stream" error when starting server for real from a fork
Deprecate `Class` handler in `PredicateBuilder`

Users should pass strings to queries instead of classes
Merge pull request #17825 from aripollak/fix-activejob-sidekiq-integration

Fix Sidekiq ActiveJob integration setup

Conflicts:
	activejob/test/support/integration/adapters/sidekiq.rb
Merge pull request #17797 from y-yagi/donot_delete_mailer_layouts

Don't remove mailer layouts files
Merge pull request #17916 from mrgilman/deprecate-class-handler

Deprecate `Class` handler in `PredicateBuilder`
Remove deprecated behavior allowing nested arrays as query values