[clang-tools-extra] [clang-tidy] Allow type-generic builtins in pro-type-vararg check (PR #178656)

[via cfe-commits]

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@@ -57,6 +57,12 @@ void ignoredBuiltinsTest(void *ptr) {
   (void)__builtin_fpclassify(0, 0, 0, 0, 0, 0.f);
   (void)__builtin_isinf_sign(0.f);
   (void)__builtin_prefetch(nullptr);
+
+  // GH#178629: Type-generic builtins should not warn.
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zeyi2 wrote:

small nit, IMHO this comment is not necessary:
```suggestion
```

https://github.com/llvm/llvm-project/pull/178656