[clang-tools-extra] [clang-tidy] Adds readability-redundant-const check (PR #189733)

[via cfe-commits]

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+.. title:: clang-tidy - readability-redundant-const
+
+readability-redundant-const
+=============================
----------------
EugeneZelenko wrote:

```suggestion
readability-redundant-const
===========================
```

https://github.com/llvm/llvm-project/pull/189733