[llvm] [AArch64] Fix lowring error for masked load/store integer scalable ve… (PR #99354)

[Sander de Smalen via llvm-commits]

sdesmalen-arm wrote:

The commit message of the PR should probably be updated too now.

Please also replace 'lowering' by 'widening' in the title.

https://github.com/llvm/llvm-project/pull/99354