[llvm] [WebAssembly][GlobalISel] Implement pointer and memory ops. (PR #206885)

[Vladimir Vereschaka via llvm-commits]

vvereschaka wrote:

>Is it urgent that this be reverted?
I think it is ok to wait for few hours and give a time to calmy figure out the problem.

https://github.com/llvm/llvm-project/pull/206885