4fe4a52cd7
In particular, while Object (un)linking was already tagged in relevant BKE code, collection (un)linking was not in several cases. This was (partially) done by user code, though almost never for the whole hierarchy of parents. Technically, the tag is done as part of `collection_object_cache_free_parent_recursive`/`collection_object_cache_free`, since currently clearing this cache is done everytime to collection hierarchy or their content is modified. It also removes `collection_tag_update_parent_recursive`, which was already doing something similar, but was only called from code adding/removing objects to collections, and was walking the same parent hierarchy as `collection_object_cache_free_parent_recursive`. This commit implements the decision made in #116601, to tag modified data as close as possible from the code modifying it. --------------------- This has an impact on deg tagging, which takes over twice as much cycles with this commit compared to previous code when opening a Pets production file with several liboverrides (`deggraph_id_tag_update_single_flag` goes from less than 0.03% to over 0.06%). The overhead remains extremely low though, and is totally unmeasurable in global execution timing. Timing of the liboverride processing on opening the production file also did not show any measurable differences. Pull Request: https://projects.blender.org/blender/blender/pulls/116986
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