Only show Object Detail when there is 1 row - otherwise always show Table

[flamber]

Describe the bug
When filtering on a field type "Entity Key", but the result might contain more than 1 row (eg. because of composite keys #3475), then an Object View is shown, which leads to incorrect representation of the results.

To Reproduce

1. Admin > Data Model > Sample Dataset > Orders
2. Change "ID" field type to "No special type", and "Quantity" to "Entity Key"
3. Simple question > Sample Dataset > Orders - click any row of Quantity, which then shows Object Detail visualization even though the request result returns more than 1 row (2000 in this case).
   

Expected behavior
Only show Object Detail, when the result is 1 row - otherwise always show a table.
This will protect against accidental incorrect Field Type, or when the data somehow deviates from expectations.

Information about your Metabase Installation:
Metabase 0.34.3 thru 0.37.0.2 - probably always been the behavior.

Additional context
Related to #7599 and #9447 and #11503