Some items in the node editors' add menus were not properly
translated. The affected items referenced an enum property on a node,
such as Math node's Operation.
Since some of those enums use a specific translation context, the same
context must be used when adding them to the search menus. The context
can simply be retrieved from the bl_rna prop itself.
In addition, some items use labels that are already translated
manually and do not need the auto translation, so disable that in
those cases (translate=False).
No new messages are added by this change.
Reported by Ye Gui in #43295.
Pull Request: https://projects.blender.org/blender/blender/pulls/141629