[llvm] [AArch64][GlobalISel] SIMD fpcvt codegen for fptoi(_sat) (PR #160831)

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https://github.com/CarolineConcatto commented:

I noticed that we added some patterns for globalISel that I am not sure will ever be used.
If they will be used can you give maybe a comment on them. I usually dont like to add patterns that are not followed by a tests in  a PR

https://github.com/llvm/llvm-project/pull/160831