Network errors for collection items misleadingly show empty collection UI

[dpsutton]

Describe the bug

If the endpoints powering collections have an error for whatever reason, we show an empty collection UI instead of something indicating an error. This is quite confusing and we should just be a bit more honest and say we had an error

To Reproduce

probably easiest to add an error to the collection items endpoints and then see an empty UI

Expected behavior

some indication that an error happened. The current behavior made people worry about data loss instead of hiccups.

Logs

No response

Information about your Metabase installation

master

Severity

p2

Additional context

No response