Migrate acquisition fixtures to document-root controls

internal/engine/destination_tiers_test.go

@@ -214,7 +214,7 @@ func TestLayeredDestinationChecksVersionOnceOnComposedMain(t *testing.T) {
 		App appConfig `yaml:"app"`
 	}
 	filesystem := NewFilesystem("bundle", fstest.MapFS{
-		"main.yml":     &fstest.MapFile{Data: []byte("configkit: {imports: [{path: fragment.yml}]}\nversion: 6\ncount: 4\nmain: main\n")},
+		"main.yml":     &fstest.MapFile{Data: []byte("config: {imports: [{path: fragment.yml}]}\nversion: 6\ncount: 4\nmain: main\n")},
 		"fragment.yml": &fstest.MapFile{Data: []byte("imported: included\n")},
 	})
 	checks := 0
@@ -300,7 +300,7 @@ func TestLayeredDestinationVersionClaimsUsePlacedApplicationPaths(t *testing.T)
 		t.Run(test.name, func(t *testing.T) {
 			t.Parallel()
 			directory := t.TempDir()
-			writeImportFile(t, directory, "main.yml", "configkit: {imports: [{path: fragment.yml}]}\n")
+			writeImportFile(t, directory, "main.yml", "config: {imports: [{path: fragment.yml}]}\n")
 			writeImportFile(t, directory, "fragment.yml", test.body)
 			loaded, err := LoadLayered(
 				Input{Source: NoSource()},