[clang-tools-extra] [llvm] [clang-tidy] New check `misc-header-guard` (PR #177315)

[Baranov Victor via cfe-commits]

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@@ -266,6 +266,7 @@ Clang-Tidy Checks
    :doc:`misc-coroutine-hostile-raii <misc/coroutine-hostile-raii>`,
    :doc:`misc-definitions-in-headers <misc/definitions-in-headers>`, "Yes"
    :doc:`misc-explicit-constructor <misc/explicit-constructor>`, "Yes"
+   :doc:`misc-header-guard <misc/header-guard>`,
----------------
vbvictor wrote:

```suggestion
   :doc:`misc-header-guard <misc/header-guard>`, "Yes"
```

https://github.com/llvm/llvm-project/pull/177315