distro: add containers arg to ImageType.Manifest

This is the first step to support embedding container images. Here
we add the `containers []container.Spec` argument to supply images
with resolved container specifications. For now all distros will
return an error in case a container is actually supplied since none
of them currently support embedding containers. NB: also no apis or
tools will actually resolve containers.

cmd/gen-manifests/main.go

@@ -128,7 +128,7 @@ func makeManifestJob(name string, imgType distro.ImageType, cr composeRequest, d
 			// use default OSTreeRef for image type
 			options.OSTree.Ref = imgType.OSTreeRef()
 		}
-		manifest, err := imgType.Manifest(cr.Blueprint.Customizations, options, repos, packageSpecs, seedArg)
+		manifest, err := imgType.Manifest(cr.Blueprint.Customizations, options, repos, packageSpecs, nil, seedArg)
 		if err != nil {
 			return fmt.Errorf("[%s] failed: %s", filename, err)
 		}

cmd/osbuild-pipeline/main.go

@@ -186,6 +186,7 @@ func main() {
 			options,
 			repos,
 			depsolvedSets,
+			nil,
 			seedArg)
 		if err != nil {
 			panic(err.Error())

cmd/osbuild-store-dump/main.go

@@ -29,7 +29,7 @@ func getManifest(bp blueprint.Blueprint, t distro.ImageType, a distro.Arch, d di
 		}
 		pkgSpecSets[name] = res
 	}
-	manifest, err := t.Manifest(bp.Customizations, distro.ImageOptions{}, repos, pkgSpecSets, 0)
+	manifest, err := t.Manifest(bp.Customizations, distro.ImageOptions{}, repos, pkgSpecSets, nil, 0)
 	if err != nil {
 		panic(err)
 	}