Custom columns don't work after aggregation unless the user has native query permissions

[zbodi74]

Describe the bug

In questions based on native models, post aggregation custom columns no longer work, unless the user is given native query permissions.

To Reproduce

1. Create a native model (select * from products), save it

Log in with a user that does not have native query permissions:
2. Create a GUI question, based on the model created in step 1
3. Add an aggregation(summarize: Count of Rows, by Category)
4. Add a custom column ([Count] + 1)
5.(!) Visualize, and see the error

Assigning native query permissions to the user makes the question runnabl.

Expected behavior

The question should work without native query permissions.

Logs

n/a

Information about your Metabase installation

1.49.10

Severity

P1 - affects a common function

Additional context

Reproduced it in 49.10 but I suspect the issue might have existed in earlier versions (49.8).