[clang-tools-extra] [clang-tidy] Extend readability-redundant-parentheses to declarations (PR #196739)

[Yanzuo Liu via cfe-commits]

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zwuis wrote:

Please add tests with nested parentheses.

Please add tests with parenthese between stars or something like that, e.g. `int *(*x)`.

https://github.com/llvm/llvm-project/pull/196739