Fairly weird, debug builds were fine, but release ones with clang 19
and mold failed at linking step, complaining about misisng
`bNode::output_sockets()` symbol.
Guess debug config somehow pulls this symbol from somewhere else?
Use BLI_uniquename_cb to check and fix naming conflicts, and keep track
of the potentially modified node names in a map.
Reserve the material name, so that later the output node can be renamed to it
without conflicts. Also make sure there are no conflicts with names auto
generated by MaterialX, by always naming nodes ourselves.
Pull Request: https://projects.blender.org/blender/blender/pulls/133234
