[llvm] [AArch64][GISel] Support SVE with 128-bit min-size for G_LOAD and G_STORE (PR #92130)

[Amara Emerson via llvm-commits]

https://github.com/aemerson approved this pull request.

Thanks for working on this as a first step. LGTM now.

https://github.com/llvm/llvm-project/pull/92130