In order to implement this action properly with workspace model, we now recreate serializers in JpsProjectModelSynchronizer and change entitySource for project-level libraries from *.ipr file to file under .idea/libraries. (We'll need to do the same for artifacts when we migrate them to workspace model.)

(cherry picked from commit 00a3ebbb8df8a2b3799241e0589836a8f3eef68e, IDEA-CR-71415)

GitOrigin-RevId: 81394bbe168e7951657bed19008e0ed0df4aeaf5