Summary:
Loot command doesn't recognise suspicious sand as a loot table holding container

Steps to reproduce:

1. place some suspicious sand
2. use the loot command on it like "/loot replace block 118.64 70.28 211.00 slot.container 0 loot "entities/desert_pyramid_suspicious_sand""

Observed results:The game does an error and says "target position is not a container"

Expected results:suspicious sand contains a loot table just like chests and other containers so the loot command should work on it too so we can put our own loot in them since we don't have nbt command support.