* Adding es query alert type to server with commented out executor
* Adding skeleton es query alert to client with JSON editor. Pulled out index popoover into component for reuse between index threshold and es query alert types
* Implementing alert executor that performs query and matches condition against doc count
* Added tests for server side alert type
* Updated alert executor to de-duplicate matches and create instance for every document if threshold is not defined
* Moving more index popover code out of index threshold and es query expression components
* Ability to remove threshold condition from es query alert
* Validation tests
* Adding ability to test out query. Need to add error handling and it looks ugly
* Fixing bug with creating alert with threshold and i18n
* wip
* Fixing tests
* Simplifying executor logic to only handle threshold and store hits in action context
* Adding functional test for es query alert
* Types
* Adding functional test for query testing
* Fixing unit test
* Adding link to ES docs. Cleaning up logger statements
* Adding docs
* Updating docs based on feedback
* PR fixes
* Using ES client typings
* Fixing unit test
* Fixing copy based on comments
* Fixing copy based on comments
* Fixing bug in index select popover
* Fixing unit tests
* Making track_total_hits configurable
* Fixing functional test
* PR fixes
* Added unit test
* Removing unused import
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>