opacity backend code broken for xetex/dvipdfmx

[u-fischer]

The backend uses in the opacity code for xetex/dvipdfmx in a two place \__kernel_backend_literal:n instead of \__kernel_backend_literal_pdf:n and then opacity doesn't work at all.

\DocumentMetadata{uncompress}
\documentclass{article}
\usepackage{transparent}

\ExplSyntaxOn
\cs_set_protected:Npn \__opacity_backend_select_aux:n #1 % \__opacity_backend_fill_stroke:nn is wrong too.
  {
    \tl_set:Nn \l__opacity_backend_fill_tl {#1}
    \tl_set:Nn \l__opacity_backend_stroke_tl {#1}
    \pdfmanagement_add:nnn { Page / Resources / ExtGState }
      { opacity #1 }
      { << /ca ~ #1 /CA ~ #1 >> }
    \__kernel_backend_literal:n
    %\__kernel_backend_literal_pdf:n %<--- new
      { /opacity #1 ~ gs }
    \group_insert_after:N \__opacity_backend_reset:
  }
  
\ExplSyntaxOff

\begin{document}
\ExplSyntaxOn \showoutput
XXXXXXX%
{\opacity_select:n{0.5}XXXXXXXXXXXX}
XXXXXXX
\ExplSyntaxOff

\end{document}