Whenever animation on nodes was transfered to/from nodegroups (grouping/
ungrouping/separating) via BKE_animdata_transfer_by_basepath, it was
possible to create new nodes with the same name (in the formerly same
path -- see report for an example of this) and animation from the
original node was still performed on them. Issue went away after save/
reload.

In order to fully update the action, a depsgraph is now performed on the
action (similar to what is done when renaming for example).

Maniphest Tasks: T101109

Differential Revision: https://developer.blender.org/D15987