[clang] [clang-tools-extra] [clang-tidy] Add new check: `readability-redundant-typename` (PR #161574)

[Victor Chernyakin via cfe-commits]

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@@ -208,6 +208,13 @@ New checks
 
   Detect redundant parentheses.
 
+- New :doc:`readability-redundant-typename
+  <clang-tidy/checks/readability/redundant-typename>` check.
+
+  Finds redundant uses of the ``typename`` keyword. Can be used
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localspook wrote:

I guess my worry is that users might look at this description, not see that this check could be useful for codebases that have migrated to C++20, and dismiss it without even looking at the documentation. Maybe I shouldn't worry so much about it though.

https://github.com/llvm/llvm-project/pull/161574