[llvm] WebAssembly: Move runtime libcall setting out of TargetLowering (PR #142624)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> > RuntimeLibcallInfo needs to be correct outside of codegen contexts.
> 
> Can you explain why?

If you're doing LTO of with libc or compiler-rt included in the build, we need to maintain an accurate list of functions that may be required during later codegen 


> Are all of these wrong too?


Yes


https://github.com/llvm/llvm-project/pull/142624