Blender Git Loki

Fix part of T93799: Outliner: Remap Users crash (for `ID Type` `Object`).

This commit fixes the crash itself, however this can still lead to a
same collection 'owning' the same object several time.

Issue here was a bad assumption in layer resync code, that would lead to
removing valid objects from the viewlayer's `object_bases_hash` in
`BKE_layer_collection_sync`, when deleting no-more-used bases, in case
of bases duplicate.