33b9d54abb
This allows Python scripts to easily determine what Slot a Channelbag is for. This is particularly important because we're trying to discourage the use of Slot handles in the Python APIs, and before this the only way to identify which Slot a Channelbag was for was via the Channelbag's `slot_handle` property. Pull Request: https://projects.blender.org/blender/blender/pulls/134053