[clang-tools-extra] [clang-tidy] Implement alphabetical order test (PR #166072)

[via cfe-commits]

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@@ -0,0 +1,285 @@
+#!/usr/bin/env python3
+#
+# ===-----------------------------------------------------------------------===#
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+# ===-----------------------------------------------------------------------===#
+
+"""
+
+ClangTidy Alphabetical Order Checker
----------------
EugeneZelenko wrote:

```suggestion
Clang-Tidy Alphabetical Order Checker
```

https://github.com/llvm/llvm-project/pull/166072