[llvm] [AArch64][SLP] Add NFC test cases for floating point reductions (PR #106507)

[Sushant Gokhale via llvm-commits]

sushgokh wrote:

> Do you intend to change them in general or just for -mcpu=neoverse-v2?

Right now, the patch intends to address the issue just for Neoverse-V2. I couldn't test patch for any other cpu(<= neoverse-n2). Maybe could you help me in this regard?

https://github.com/llvm/llvm-project/pull/106507