[llvm] [llvm][NFC]Support callee saved register info in save/restore points (PR #119358)

[Elizaveta Noskova via llvm-commits]

enoskova-sc wrote:

@preames, I split the 4th patch, and this part introduces information about registers spilled/restored in save/restore points (as you suggested), but it still does not provide the possibility to have multiple save/restore points.

https://github.com/llvm/llvm-project/pull/119358