[clang] [llvm] [AArch64][SME] Disable inlining of callees with new ZT0 state (PR #121338)

[Benjamin Maxwell via llvm-commits]

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

LGTM :+1: You could maybe add a test to `clang/test/CodeGen/AArch64/sme-inline-callees-streaming-attrs.c` too (which tests `flatten`/`always_inline` statements.

https://github.com/llvm/llvm-project/pull/121338