[llvm] [WebAssembly] Split separate component LiveIntervals for TEEs (PR #131561)

[Heejin Ahn via llvm-commits]

aheejin wrote:

Yeah I don't know why `RegisterCoalescer::shrinkToUses` was written that way or if that was even correct either, but given that this causes a real crash with `-verify-machineinstrs` in RegStackify, I think we can at least land this?

https://github.com/llvm/llvm-project/pull/131561