[llvm] [AArch64] Add streaming-mode stack hazards. (PR #98956)

[Kerry McLaughlin via llvm-commits]

https://github.com/kmclaughlin-arm approved this pull request.

Thanks @davemgreen, I've just let one minor comment on the test file but otherwise this LGTM.

https://github.com/llvm/llvm-project/pull/98956