AzureMonitor: Update UI to experimental package (#52123)

* feat: make azure experimental the default

* feat: combine metrics query editor rows

fix: linter errors

* chore: remove test loop for DimensionFields test

pkg/services/featuremgmt/registry.go

@@ -187,12 +187,6 @@ var (
 			Description: "Introduce HTTP 207 Multi Status for api/ds/query",
 			State:       FeatureStateAlpha,
 		},
-		{
-			Name:         "azureMonitorExperimentalUI",
-			Description:  "Use grafana-experimental UI in Azure Monitor",
-			State:        FeatureStateAlpha,
-			FrontendOnly: true,
-		},
 		{
 			Name:         "traceToMetrics",
 			Description:  "Enable trace to metrics links",

pkg/services/featuremgmt/toggles_gen.go

@@ -139,10 +139,6 @@ const (
 	// Introduce HTTP 207 Multi Status for api/ds/query
 	FlagDatasourceQueryMultiStatus = "datasourceQueryMultiStatus"
 
-	// FlagAzureMonitorExperimentalUI
-	// Use grafana-experimental UI in Azure Monitor
-	FlagAzureMonitorExperimentalUI = "azureMonitorExperimentalUI"
-
 	// FlagTraceToMetrics
 	// Enable trace to metrics links
 	FlagTraceToMetrics = "traceToMetrics"