Alerting: Display query from grafana-managed alert rules on /api/v1/rules (#45969)

* Aleting: Extract query from alerting rule model for api/v1/rules

* more changes and fixtures

* appease the linter

pkg/services/ngalert/api/testing.go

@@ -11,7 +11,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/ngalert/models"
 	"github.com/grafana/grafana/pkg/services/ngalert/state"
 	"github.com/grafana/grafana/pkg/services/ngalert/store"
-	"github.com/grafana/grafana/pkg/util"
 
 	"github.com/grafana/grafana-plugin-sdk-go/data"
 )
@@ -73,13 +72,15 @@ func (f *fakeAlertInstanceManager) GetStatesForRuleUID(orgID int64, alertRuleUID
 	return f.states[orgID][alertRuleUID]
 }
 
-func (f *fakeAlertInstanceManager) GenerateAlertInstances(orgID int64, count int) {
+// forEachState represents the callback used when generating alert instances that allows us to modify the generated result
+type forEachState func(s *state.State) *state.State
+
+func (f *fakeAlertInstanceManager) GenerateAlertInstances(orgID int64, alertRuleUID string, count int, callbacks ...forEachState) {
 	f.mtx.Lock()
 	defer f.mtx.Unlock()
 
-	evaluationTime := time.Now()
+	evaluationTime := timeNow()
 	evaluationDuration := 1 * time.Minute
-	alertRuleUID := util.GenerateShortUID()
 
 	for i := 0; i < count; i++ {
 		_, ok := f.states[orgID]
@@ -91,8 +92,8 @@ func (f *fakeAlertInstanceManager) GenerateAlertInstances(orgID int64, count int
 			f.states[orgID][alertRuleUID] = []*state.State{}
 		}
 
-		f.states[orgID][alertRuleUID] = append(f.states[orgID][alertRuleUID], &state.State{
-			AlertRuleUID: fmt.Sprintf("alert_rule_%v", i),
+		newState := &state.State{
+			AlertRuleUID: alertRuleUID,
 			OrgID:        1,
 			Labels: data.Labels{
 				"__alert_rule_namespace_uid__": "test_namespace_uid",
@@ -117,6 +118,14 @@ func (f *fakeAlertInstanceManager) GenerateAlertInstances(orgID int64, count int
 			LastEvaluationTime: evaluationTime.Add(1 * time.Minute),
 			EvaluationDuration: evaluationDuration,
 			Annotations:        map[string]string{"annotation": "test"},
-		})
+		}
+
+		if len(callbacks) != 0 {
+			for _, cb := range callbacks {
+				newState = cb(newState)
+			}
+		}
+
+		f.states[orgID][alertRuleUID] = append(f.states[orgID][alertRuleUID], newState)
 	}
 }