Players can spawn underwater again in 1.21

Clones MC-7908.

Players can spawn underwater again in 1.21.

Steps to reproduce:

Use the seed:4015 to create a normal type world.

Observed result:

You will spawn at the bottom of an ocean.

Expected result:

You will not spawn at the surface of the water.

Other discoveries:

1.This seed causes the colormap of the world loading screen keeps black until the world is completely loaded.

2.You will always spawn at the same coords (-727.5, 50, -631.5) with this seed, regardless of SpawnRadius value set.