[clang-tools-extra] [clang-tidy] Add redundant qualified alias check (PR #180404)

[Daniil Dudkin via cfe-commits]

unterumarmung wrote:

@zwuis The check now skips aliases declared in control-flow init-statements (`if`/`switch`/`for`/`range-for`), because rewriting to a using-declaration is not valid there. Thank you for the pointer!

https://github.com/llvm/llvm-project/pull/180404