* Use suggested value for uid
* update the snapshot
* use __expr__
* replace all -100 with __expr__
* update snapshot
* more changes
* revert redundant change
* Use expr.DatasourceUID where it's possible
* generate files
* [Alerting]: Add alerting endpoint for Query Evaluation
* Fix passing down now parameter
* Add validations and test
* Fix eval queries and expressions test
* Add eval tests