* Parallel QP tests; linter improvements; move QP test fns

* Cleanup

* Move query->expected-cols

* Fix QP test namespace

* Test fix 

* Fix merge issues

* Revert unrelated changes

* Test fix 

* Fix some things that are actually ^:parallel safe

* Remove Oracle logic for destroying DBs from different sessions since we don't test on AWS anymore

* Use ReentrantReadWriteLock for getting + creating test datasets to avoid race conditions

* Add non-`metabase.test` versions of things to the disallowed list for `^:parallel` tests