[clang-tools-extra] [clang-tidy][NFC] Update header guards to match LLVM style (PR #166669)

[Baranov Victor via cfe-commits]

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@@ -6,8 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_HEADERGUARDCHECK_H
-#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_HEADERGUARDCHECK_H
+#ifndef LLVM_HEADERGUARDCHECK_H
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vbvictor wrote:

Soo I guess the check removes leading part if sees "LLVM" in check-name. Seem like a general bug.

https://github.com/llvm/llvm-project/pull/166669