Alerting: Restart rule routines if the type changes (#90867)

* Restart when types change

* Wire up test hooks correctly

* testing

pkg/services/ngalert/models/alert_rule.go

@@ -108,8 +108,8 @@ const (
 type RuleType string
 
 const (
-	RuleTypeAlerting  = "alerting"
-	RuleTypeRecording = "recording"
+	RuleTypeAlerting  RuleType = "alerting"
+	RuleTypeRecording RuleType = "recording"
 )
 
 func (r RuleType) String() string {

pkg/services/ngalert/models/testing.go

@@ -495,13 +495,13 @@ func (a *AlertRuleMutators) WithRandomRecordingRules() AlertRuleMutator {
 		if rand.Int63()%2 == 0 {
 			return
 		}
-		convertToRecordingRule(rule)
+		ConvertToRecordingRule(rule)
 	}
 }
 
 func (a *AlertRuleMutators) WithAllRecordingRules() AlertRuleMutator {
 	return func(rule *AlertRule) {
-		convertToRecordingRule(rule)
+		ConvertToRecordingRule(rule)
 	}
 }
 
@@ -1092,7 +1092,7 @@ func (n SilenceMutators) WithEmptyId() Mutator[Silence] {
 	}
 }
 
-func convertToRecordingRule(rule *AlertRule) {
+func ConvertToRecordingRule(rule *AlertRule) {
 	if rule.Record == nil {
 		rule.Record = &Record{}
 	}