Alerting: update DeleteAlertRuleByUID to accept many UID (#46890)

pkg/services/ngalert/store/testing.go

@@ -76,7 +76,9 @@ func (f *FakeRuleStore) GetRecordedCommands(predicate func(cmd interface{}) (int
 	return result
 }
 
-func (f *FakeRuleStore) DeleteAlertRuleByUID(_ context.Context, _ int64, _ string) error { return nil }
+func (f *FakeRuleStore) DeleteAlertRulesByUID(_ context.Context, _ int64, _ ...string) error {
+	return nil
+}
 func (f *FakeRuleStore) DeleteNamespaceAlertRules(_ context.Context, _ int64, _ string) ([]string, error) {
 	return []string{}, nil
 }