Alerting: Add custom grouping for alert groups (#37378)

* Group alertmangaer alerts by custom grouping

* Filter am groups

* Style filter components

* Style filter bar and add clear functionality

* rename components to alert group

* use query params for group filters

* filter style improvements

* add tests for group by

* Add grouping banner to better highlight groupings

* clean up hook logic

public/app/types/unified-alerting.ts

@@ -127,8 +127,9 @@ export interface PrometheusRuleIdentifier {
 }
 
 export type RuleIdentifier = CloudRuleIdentifier | GrafanaRuleIdentifier | PrometheusRuleIdentifier;
-export interface RuleFilterState {
+export interface FilterState {
   queryString?: string;
   dataSource?: string;
   alertState?: string;
+  groupBy?: string[];
 }