[clang-tools-extra] [clang-tidy] Add `modernize-use-as-const` check (PR #210554)

[Baranov Victor via cfe-commits]

vbvictor wrote:

Please see https://clang.llvm.org/extra/clang-tidy/Contributing.html#making-your-check-robust

https://github.com/llvm/llvm-project/pull/210554