[llvm] [TTI] Use TypeSize in isLoadFromStackSlot and isStoreToStackSlot [nfc] (PR #132244)

[Min-Yih Hsu via llvm-commits]

https://github.com/mshockwave commented:

maybe `s/TypeSize::getFixed(0)/TypeSize::getZero()/` ?

https://github.com/llvm/llvm-project/pull/132244