[clang-tools-extra] [clang-tidy] Improve redundant-casting check for binary operation (PR #191386)

[Zeyi Xu via cfe-commits]

zeyi2 wrote:

> Does this need a ReleaseNotes entry?

Generally yes, unless when we want to backport a commit or fixing a new feature that has not been released before :)

https://github.com/llvm/llvm-project/pull/191386