fix: exclude Azure Monitor scaler from metricName deprecation (#4713)

CHANGELOG.md

@@ -71,6 +71,7 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
 - **Admission Webhooks**: Check ScaledObjects with multiple triggers with non unique name ([#4664](https://github.com/kedacore/keda/issue/4664))
 - **ScaledJob**: Check if MaxReplicaCount is nil before access to it ([#4568]https://github.com/kedacore/keda/issues/4568)
 - **AWS SQS Scaler**: Respect `scaleOnInFlight` value ([#4276](https://github.com/kedacore/keda/issue/4276))
+- **Azure Monitor**: Exclude Azure Monitor scaler from metricName deprecation ([#4713](https://github.com/kedacore/keda/pull/4713))
 - **Azure Pipelines**: Fix for disallowing `$top` on query when using `meta.parentID` method ([#4397])
 - **Azure Pipelines**: Respect all required demands ([#4404](https://github.com/kedacore/keda/issues/4404))
 - **NATS Jetstream Scaler**: Fix compatibility if node is not advertised ([#4524](https://github.com/kedacore/keda/issues/4524))

apis/keda/v1alpha1/scaletriggers_types.go

@@ -65,8 +65,8 @@ func ValidateTriggers(logger logr.Logger, triggers []ScaleTriggers) error {
 
 			// FIXME: DEPRECATED to be removed in v2.12
 			_, hasMetricName := trigger.Metadata["metricName"]
-			// aws-cloudwatch and huawei-cloudeye have a meaningful use of metricName
-			if hasMetricName && trigger.Type != "aws-cloudwatch" && trigger.Type != "huawei-cloudeye" {
+			// aws-cloudwatch, huawei-cloudeye and azure-monitor have a meaningful use of metricName
+			if hasMetricName && trigger.Type != "aws-cloudwatch" && trigger.Type != "huawei-cloudeye" && trigger.Type != "azure-monitor" {
 				logger.Info("\"metricName\" is deprecated and will be removed in v2.12, please do not set it anymore", "trigger.type", trigger.Type)
 			}