concept dt validation not working on tile.save() if concept-list nodevalue mistakenly saved

[whatisgalen]

Discovered this while working on a test for #10789,

If you notice that in this setup logic in search tests,

tile = Tile(
            data={cls.search_model_cultural_period_nodeid: [valueid]},
            nodegroup_id=cls.search_model_cultural_period_nodeid,
        )
... 
tile.save()

the valueid is saved as a list even though the datatype for the node is 'concept', not 'concept-list'.

No errors or warnings are raised for this. It only gets caught on this line upstream of search_export:

File "/Users/galenmancino/repos/arches/arches/app/datatypes/concept_types.py", line 284, in get_display_value
    if data[str(node.nodeid)] is None or data[str(node.nodeid)].strip() == "":
                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'strip'

...because the datatype of the nodevalue is at odds with the datatype of the node.