[clang] [llvm] [AArch64] Refactor implementation of FP8 types (NFC) (PR #118969)

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https://github.com/SpencerAbson commented:

Thanks! Does this work need to be based on https://github.com/llvm/llvm-project/pull/118957 and https://github.com/llvm/llvm-project/pull/118961?

https://github.com/llvm/llvm-project/pull/118969