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

[Mats Kindahl via cfe-commits]

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@@ -0,0 +1,41 @@
+.. title:: clang-tidy - bugprone-unsafe-api-functions-calls
+
+bugprone-unsafe-api-functions-calls
+====================================
+
+Warns when ``setvbuf()`` or ``setbuf()`` is called with a
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mkindahl wrote:

I added a blurb to start the section about the check and added a sub-section with only `setvbuf()` and `setbuf()`. PTAL.

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