* Implemented Alerting health status pusher by using task manager and status pooler for Kibana status plugins 'kibanahost/api/status'
* Exposed health task registration to alerts plugin
* Fixed type error
* Extended health API endpoint with info about decryption failures, added correct health task implementation
* adjusted query
* Tested locally and got it working as expected, fixed tests and type check
* Added unit tests
* Changed AlertExecutionStatusErrorReasons to be enum
* Uppercase the enum
* Replaced string values to enum
* Fixed types
* Extended AlertsClient with getHealth method
* added return type to healthStatus$
* Added configurable health check interval and timestamps
* Extended update core status interval to 5mins
* Fixed failing tests
* Registered alerts config
* Fixed date for ok health state
* fixed jest test
* fixed task state
* Fixed due to comments, moved getHealth to a plugin level
* fixed type checks
* Added sorting to the latest Ok state last update
* adjusted error queries
* Fixed jest tests
* removed unused
* fixed type check
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