[clang-tools-extra] Add check 'cppcoreguidelines-use-enum-class' (PR #138282)

[via cfe-commits]

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+.. title:: clang-tidy - cppcoreguidelines-use-enum-class
+
+cppcoreguidelines-use-enum-class
+================================
+
+Finds unscoped (non-class) ``enum`` declarations and suggests using
+``enum class`` instead.
+
+This check implements `Enum.3
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EugeneZelenko wrote:

Will be good idea to make link location consistent across all checks documentation.

https://github.com/llvm/llvm-project/pull/138282