Make CAPI Azure the default install method

Author: sadasu

pkg/infrastructure/platform/platform.go

@@ -44,10 +44,7 @@ func ProviderForPlatform(platform string, fg featuregates.FeatureGate) (infrastr
 	case awstypes.Name:
 		return clusterapi.InitializeProvider(&awscapi.Provider{}), nil
 	case azuretypes.Name:
-		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
-			return clusterapi.InitializeProvider(&azureinfra.Provider{}), nil
-		}
-		return terraform.InitializeProvider(azure.PlatformStages), nil
+		return clusterapi.InitializeProvider(&azureinfra.Provider{}), nil
 	case azuretypes.StackTerraformName:
 		return terraform.InitializeProvider(azure.StackPlatformStages), nil
 	case baremetaltypes.Name:

pkg/infrastructure/platform/platform_altinfra.go

@@ -34,10 +34,7 @@ func ProviderForPlatform(platform string, fg featuregates.FeatureGate) (infrastr
 	case awstypes.Name:
 		return clusterapi.InitializeProvider(&awscapi.Provider{}), nil
 	case azuretypes.Name:
-		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
-			return clusterapi.InitializeProvider(&azurecapi.Provider{}), nil
-		}
-		return nil, nil
+		return clusterapi.InitializeProvider(&azurecapi.Provider{}), nil
 	case gcptypes.Name:
 		return clusterapi.InitializeProvider(gcpcapi.Provider{}), nil
 	case ibmcloudtypes.Name:

pkg/types/installconfig.go

@@ -588,12 +588,10 @@ func ClusterAPIFeatureGateEnabled(platform string, fgs featuregates.FeatureGate)
 
 	// Check if CAPI install is enabled for individual platforms.
 	switch platform {
-	case aws.Name, gcp.Name, nutanix.Name, openstack.Name, vsphere.Name:
+	case aws.Name, azure.Name, gcp.Name, nutanix.Name, openstack.Name, vsphere.Name:
 		return true
 	case azure.StackTerraformName, azure.StackCloud.Name():
 		return false
-	case azure.Name:
-		return fgs.Enabled(features.FeatureGateClusterAPIInstallAzure)
 	case ibmcloud.Name:
 		return fgs.Enabled(features.FeatureGateClusterAPIInstallIBMCloud)
 	case powervs.Name: