The root of the issue was checking against the wrong RNA type to decide
whether a collection's item resolution could use the stored ID pointers
or not, leading to always only relying on names in CollectionObjects
case, leading to a lot of false 'need resync' detections in case names
would get out of sync between liboverrides and linked reference data.
Note that this probably had no other effect than resyncing when not
needed, since actual liboverride apply and resync code would already
do the right thing here.
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