* Chore/Tech debt: Remove (most) instances of $q angular service use
Removes instances where the angular $q service is used and replaces
it with native Promises.
* Fix: Fixes searchfilter wildcard char in regular expressions
Fixes: #20006
* Refactor: Uses TemplateSrv and ScopedVars instead
* Docs: Updates docs with new format
* Tests: Corrects test description
* WIP: Initial hardcoded version
* Feature: Introduces SearchFiltering to Graphite
* Feature: Adds searchFiltering to MySql
* Tests: Adds tests to Graphite and MySql
* Feature: Adds $__searchFilter to TestData
* Refactor: Adds searchFilter to Postgres and extracts function
* Tests: Adds tests to variable
* Refactor: Adds debounce and lodash import optimization
* Docs: Adds documentation
* Refactor: Removes unused function and fixes typo
* Docs: Updates docs
* Fixed issue with UI not updating when no was used due to async func and no .apply in the non lazy path