[clang] [llvm] [AArch64] Add 9.7 CVT data processing intrinsics (PR #186807)

[Martin Wehking via cfe-commits]

MartinWehking wrote:

@Lukacma @CarolineConcatto 

I applied the changes from https://github.com/ARM-software/acle/pull/428/changes/c9897fbaceed08bca631886d666de71fe12c6f19

Please let me know if there are issues 

https://github.com/llvm/llvm-project/pull/186807