vendor: update buildkit to 664c2b469f19

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

vendor/github.com/moby/buildkit/errdefs/errdefs.go

@@ -0,0 +1,31 @@
+package errdefs
+
+import "errors"
+
+type internalErr struct {
+	error
+}
+
+func (internalErr) System() {}
+
+func (err internalErr) Unwrap() error {
+	return err.error
+}
+
+type system interface {
+	System()
+}
+
+var _ system = internalErr{}
+
+func Internal(err error) error {
+	if err == nil {
+		return nil
+	}
+	return internalErr{err}
+}
+
+func IsInternal(err error) bool {
+	var s system
+	return errors.As(err, &s)
+}