[clang] [AArch64][SME] Warn when using a streaming builtin from a non-streaming function (PR #75487)

[Sam Tebbs via cfe-commits]

SamTebbs33 wrote:

Commit [6dc8fa2](https://github.com/llvm/llvm-project/pull/75487/commits/6dc8fa2c89159d234d9477358dd1ce1cbf059865) is the only one with new content. [d9a8da1](https://github.com/llvm/llvm-project/pull/75487/commits/d9a8da139e93f0b3259cb22d7f4c55ed46f9f265) is the exact same as what was reverted.

https://github.com/llvm/llvm-project/pull/75487