[clang] [clang] Update SVE load and store intrinsics to have FP8 variants (PR #126726)

[via cfe-commits]

Lukacma wrote:

I think the changes in arm-mfp8.c are fine. These unnecessary loads and stores just for the purpose of changing type, get captured by various optimization passes and disapper in the end. 

https://github.com/llvm/llvm-project/pull/126726