500 error when PATCH or PUT are performed on Mongo 4.2 and _id is included with payload

[nicolaiarocci]

Expected Behavior

In the situation depicted above, we should return 400 Bad Request (see the relevant tests, here and here)

Actual Behavior

With Mongo 4.2, a 500 Server Error is returned instead.

Environment

• Python version: 3.8
• Eve version: 3.9.2