Alerting: Add endpoint for querying state history (#62166)

* Define endpoint and generate

* Wire up and register endpoint

* Cleanup, define authorization

* Forgot the leading slash

* Wire up query and SignedInUser

* Wire up timerange query params

* Add todo for label queries

* Drop comment

* Update path to rules subtree

pkg/services/ngalert/api/authorization.go

@@ -58,6 +58,10 @@ func (api *API) authorize(method, path string) web.Handler {
 			ac.EvalPermission(ac.ActionAlertingRuleCreate, scope),
 			ac.EvalPermission(ac.ActionAlertingRuleDelete, scope),
 		)
+	// Grafana rule state history paths
+	case http.MethodGet + "/api/v1/rules/history":
+		fallback = middleware.ReqSignedIn
+		eval = ac.EvalPermission(ac.ActionAlertingRuleRead)
 
 	// Grafana, Prometheus-compatible Paths
 	case http.MethodGet + "/api/prometheus/grafana/api/v1/rules":