* Fix: change  and  to  and  so not clashing with grafana vars (#16365)

* Fix: change  and  to  and  so not clashing with grafana vars (#16365)

* Fix: update now to datetime (#16365)

* Fix: test should look for datetime instead of now (#16365)

* Fix: _az suffix to datasource convention (#16365)

* Fix: convert vars to macro, update doc (#16365)

* Fix: convert vars to macro, update doc (#16365)

* Fix: remove support for time vars (#16365)

* Fix: confilct from master

* add migration on editor open

* fix migration var name