[clang] [llvm] [Clang][SME] Detect always_inline used with mismatched streaming attributes (PR #77936)

[Sam Tebbs via cfe-commits]

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SamTebbs33 wrote:

Agreed. I tried moving it to Support but that introduced a dependency cycle, so I re-implemented some of the SMEAttributes logic in-place instead.

https://github.com/llvm/llvm-project/pull/77936