Update Image registry configuration for image based install

Update the image registry configuration with the newly added
Image source policy field that specifies the fallback policy
when image pull fails.

Author: sadasu

pkg/asset/imagebased/image/registriesconf.go

@@ -6,6 +6,7 @@ import (
 	"github.com/containers/image/v5/pkg/sysregistriesv2"
 	"github.com/pelletier/go-toml"
 
+	configv1 "github.com/openshift/api/config/v1"
 	"github.com/openshift/installer/pkg/asset"
 	"github.com/openshift/installer/pkg/asset/ignition/bootstrap"
 	"github.com/openshift/installer/pkg/types"
@@ -73,6 +74,7 @@ func (i *RegistriesConf) generateRegistriesConf(imageDigestSources []types.Image
 		registry := sysregistriesv2.Registry{}
 		registry.Endpoint.Location = group.Source
 		registry.MirrorByDigestOnly = true
+		registry.Blocked = group.SourcePolicy == configv1.NeverContactSource
 		for _, mirror := range group.Mirrors {
 			registry.Mirrors = append(registry.Mirrors, sysregistriesv2.Endpoint{Location: mirror})
 		}