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

* Restart when types change

* Wire up test hooks correctly

* testing

pkg/services/ngalert/schedule/alert_rule.go

@@ -38,6 +38,8 @@ type Rule interface {
 	Eval(eval *Evaluation) (bool, *Evaluation)
 	// Update sends a singal to change the definition of the rule.
 	Update(lastVersion RuleVersionAndPauseStatus) bool
+	// Type gives the type of the rule.
+	Type() ngmodels.RuleType
 }
 
 type ruleFactoryFunc func(context.Context, *ngmodels.AlertRule) Rule
@@ -76,6 +78,8 @@ func newRuleFactory(
 				met,
 				tracer,
 				recordingWriter,
+				evalAppliedHook,
+				stopAppliedHook,
 			)
 		}
 		return newAlertRule(
@@ -172,6 +176,10 @@ func newAlertRule(
 	}
 }
 
+func (a *alertRule) Type() ngmodels.RuleType {
+	return ngmodels.RuleTypeAlerting
+}
+
 // eval signals the rule evaluation routine to perform the evaluation of the rule. Does nothing if the loop is stopped.
 // Before sending a message into the channel, it does non-blocking read to make sure that there is no concurrent send operation.
 // Returns a tuple where first element is