[clang] [CIR][AArch64] Handle constrained Neon FMA and sqrt (PR #218307)

[Yair Ben Avraham via cfe-commits]

yairbenavraham wrote:

> Thank you!
> 
> Kind request - move "constrained" tests to -constrained.c

Do I need to create one? E.g.  ./clang/test/CodeGen/AArch64/neon/**fma-sqrt-constrained.c**?

https://github.com/llvm/llvm-project/pull/218307