[clang-tools-extra] [clang-tidy] Add bugprone-setvbuf-stack-buffer check (PR #187637)

[Zeyi Xu via cfe-commits]

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+.. title:: clang-tidy - bugprone-setvbuf-stack-buffer
+
+bugprone-setvbuf-stack-buffer
+=============================
+
+Warns when ``setvbuf()`` is called with a stack-allocated buffer.
+
+The C standard (C11 §7.21.5.6) requires that the buffer passed to ``setvbuf()``
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zeyi2 wrote:

Can we make this a link to the standard (or at least a link to open-std or cppreference).

https://github.com/llvm/llvm-project/pull/187637