[clang] [CIR][AArch64] Lower vfma lane builtins (PR #188190)

[Andrzej Warzyński via cfe-commits]

banach-space wrote:

Closing in favour of https://github.com/llvm/llvm-project/pull/195602 and other patches that will follow.

Thank you for splitting this @yairbenavraham 🙏🏻 

https://github.com/llvm/llvm-project/pull/188190