CORS-3594: MOVE GCP CAPI to default feature set

** Set the default gcp install to use CAPI not terraform.
** Remove the terraform stages (not the terraform files) for gcp.

Author: barbacbd

pkg/infrastructure/platform/platform.go

@@ -19,7 +19,6 @@ import (
 	vspherecapi "github.com/openshift/installer/pkg/infrastructure/vsphere/clusterapi"
 	"github.com/openshift/installer/pkg/terraform"
 	"github.com/openshift/installer/pkg/terraform/stages/azure"
-	"github.com/openshift/installer/pkg/terraform/stages/gcp"
 	"github.com/openshift/installer/pkg/terraform/stages/ibmcloud"
 	"github.com/openshift/installer/pkg/terraform/stages/ovirt"
 	"github.com/openshift/installer/pkg/terraform/stages/powervs"
@@ -54,10 +53,7 @@ func ProviderForPlatform(platform string, fg featuregates.FeatureGate) (infrastr
 	case baremetaltypes.Name:
 		return baremetalinfra.InitializeProvider(), nil
 	case gcptypes.Name:
-		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
-			return clusterapi.InitializeProvider(gcpcapi.Provider{}), nil
-		}
-		return terraform.InitializeProvider(gcp.PlatformStages), nil
+		return clusterapi.InitializeProvider(gcpcapi.Provider{}), nil
 	case ibmcloudtypes.Name:
 		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
 			return clusterapi.InitializeProvider(ibmcloudcapi.Provider{}), nil

pkg/infrastructure/platform/platform_altinfra.go

@@ -39,10 +39,7 @@ func ProviderForPlatform(platform string, fg featuregates.FeatureGate) (infrastr
 		}
 		return nil, nil
 	case gcptypes.Name:
-		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
-			return clusterapi.InitializeProvider(gcpcapi.Provider{}), nil
-		}
-		return nil, nil
+		return clusterapi.InitializeProvider(gcpcapi.Provider{}), nil
 	case ibmcloudtypes.Name:
 		if types.ClusterAPIFeatureGateEnabled(platform, fg) {
 			return clusterapi.InitializeProvider(ibmcloudcapi.Provider{}), nil

pkg/terraform/stages/gcp/OWNERS

@@ -588,14 +588,12 @@ func ClusterAPIFeatureGateEnabled(platform string, fgs featuregates.FeatureGate)
 
 	// Check if CAPI install is enabled for individual platforms.
 	switch platform {
-	case aws.Name, nutanix.Name, openstack.Name, vsphere.Name:
+	case aws.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 gcp.Name:
-		return fgs.Enabled(features.FeatureGateClusterAPIInstallGCP)
 	case ibmcloud.Name:
 		return fgs.Enabled(features.FeatureGateClusterAPIInstallIBMCloud)
 	case powervs.Name: