[clang] [clang-tools-extra] [clang-tidy] bugprone-implicit-widening ignores unsigned consts (PR #101073)

[Piotr Zegar via cfe-commits]

https://github.com/PiotrZSL requested changes to this pull request.

Changes made to AST classes should be tested in clang also.
Mainly here clang/test/AST/

https://github.com/llvm/llvm-project/pull/101073