[Experimental] Goats do not spawn in new mountains

Summary:

Goats do not spawn in new mountains. This contradicts the Java version where goats spawn quite often in new mountains.

Steps to reproduce:

1. Go to new mountains.
2. Find a large area (suitable for spawning goats).

Observed results:

No matter how you search, you will not find goats in the new mountains.

Expected results:

Goats will spawn in new mountains as in the Java version.