9f4a0d230f
Action Slots point to the IDs they animate, and after swapping IDs they also need some swappage (as the Action that first animated `id_a` will now animate `id_b`, and vice versa). Instead of doing this in the `id_swap()` function (and requiring knowledge of how that's supposed to be done), just mark these pointers as dirty so that they're rebuilt at first use. This commit contains a little more code than strictly necessary, to add a function in BKE for this cache invalidation. This avoids having to have a dependency on the animrig module just for this purpose. Fixes: #130136 Pull Request: https://projects.blender.org/blender/blender/pulls/131809
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