Alerting: Update rules version when folder title is updated (#53013)

* remove support for bus from scheduler
* rename event to FolderTitleUpdated and fire only if title has changed
* add method to increase version of all rules that belong to a folder
* update ngalert service to subscribe to folder title change event call data store and update scheduler
* add tests

pkg/services/ngalert/models/testing.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/grafana/grafana-plugin-sdk-go/data"
 
+	models2 "github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/util"
 )
 
@@ -132,6 +133,18 @@ func WithSequentialGroupIndex() AlertRuleMutator {
 	}
 }
 
+func WithOrgID(orgId int64) AlertRuleMutator {
+	return func(rule *AlertRule) {
+		rule.OrgID = orgId
+	}
+}
+
+func WithNamespace(namespace *models2.Folder) AlertRuleMutator {
+	return func(rule *AlertRule) {
+		rule.NamespaceUID = namespace.Uid
+	}
+}
+
 func GenerateAlertLabels(count int, prefix string) data.Labels {
 	labels := make(data.Labels, count)
 	for i := 0; i < count; i++ {