[llvm] [llvm][CodeGen] Address the issue of multiple resource reservations In window scheduling (PR #101665)

[Hua Tian via llvm-commits]

huaatian wrote:

> Is this something that we should backport to 19.x?

I think it's better to backport to 19.x.

https://github.com/llvm/llvm-project/pull/101665