go.mod: update osbuild/images to v0.124.0

vendor/github.com/osbuild/images/internal/common/helpers.go

@@ -59,3 +59,12 @@ func ExecError(err error) error {
 	}
 	return err
 }
+
+// Must() can be used to shortcut all `NewT() (T, err)` constructors.
+// It will panic if an error is passed.
+func Must[T any](val T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+	return val
+}