[llvm] [AArch64][SME] Preserve `Chain` argument in SelectMultiVectorLutiLane (PR #161494)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

>From a quick glance it looks like this issue could be present in other "Select" functions, though I haven't made reproducers for those yet...

https://github.com/llvm/llvm-project/pull/161494