This fixes#116096 and is based on #115249 with some changes.
This patch contains three changes:
* `NodeSocket.links` in the Python API gives the links in the correct order.
* `NodeLink.multi_input_sort_id` gives read-only access to an id that's used
for sorting. Note that for historical reasons the highest id is the first link.
* `NodeLink.swap_multi_input_sort_id(other_link)` provides a safe way to
change the order of links connected to a multi-input socket.
Co-authored-by: Adrian Bibby Walther <adrianbibbywalther@gmail.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/118987
8f36281787