Wandering traders and trader llamas count towards the passive mob cap

Wandering traders and trader llamas does not have same spawning rules as animals, but they can affect the mob cap.

Steps to reproduce

1. Create a void superflat world
2. Press F3
3. Summon the wandering trader and trader llama
4. Observe the mob cap (C:*)

→ The passive mob cap is increased.

Observed result:

The wandering traders and trader llamas does not affect the mob cap.

Expected result

The wandering traders and  trader llamas can affect the mob cap.