[clang] [CIR][AArch64] Lower NEON laneq FMA builtins (PR #202337)

[Yair Ben Avraham via cfe-commits]

yairbenavraham wrote:

> LGTM, many thanks!
> 
> Non-blocking question - how do you order the FMA tests? I am just a bit surprised that new tests are interleaved with the old tests rather than added at the end. Presumably you are trying to order them?

I didn't pay too much attention to the order, shall I reorder the tests so `vfma_laneq_*` before `vfmaq_laneq_*`?

https://github.com/llvm/llvm-project/pull/202337