[clang-tools-extra] [clang-tidy] Improved readability redundant casting with enums (PR #111424)

[Julian Schmidt via cfe-commits]

5chmidti wrote:

> Fixed false negatives with readability-redundant-casting when the underlying types are the same and the option IgnoreTypeAliases is set to true.

To me,

> Fixed false negatives with readability-redundant-casting when casting an enum to its underlying type and the option IgnoreTypeAliases is set to true.

sounds better as the commit description.

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The CI failure is probably because the implicit type for `E3` is not `unsigned int` on Windows.

https://github.com/llvm/llvm-project/pull/111424