[Experimental] Water blocks on new cold mountains are not generated

Summary:

Water blocks on new cold mountains are not generated (compared to java version).

This applies to all cold mountains.

Steps to reproduce:

1. Find snowy mountains.
2. Look for water sources in the mountains.

Observed results:

No water sources are generated in the mountains.

Expected results:

Water sources will be generated in the mountains, which will flow down the mountains.

Image:

Java

Bedrock

Java