Desert temple can generate on water

Desert temples can now generate on water, which isn't supposed to happen. This is likely because this bug was carried over from the Experimental Snapshot 3 on Java Edition.

Step to Reproduce
1. Create a new world with the seed -4225. (for 1.18 beta worlds)
2. Go to -6 69 -239 to the desert temple.

Expected Result
The desert temple should be generated on the ground surface in the desert biome.

Observed Result
It somehow generates on water.