[clang-tools-extra] [clang-tidy] New bugprone-method-hiding check (PR #154746)

[via cfe-commits]

t-a-james wrote:

> > The check name is a bit too vague/general, I would call it `bugprone-derived-method-shadowing-base-method` or similar. You can easily apply the renaming with the `rename_check.py`. But let's wait until there's some consensus on this.
> 
> Agree, initially I was thinking about `bugprone-method-shadowing`: it's concise and not overwhelming IMO

Funnily enough, `bugprone-derived-method-shadowing-base-method` is very close to what this is called in our downstream project.  Just pushed something that re-names the check.

https://github.com/llvm/llvm-project/pull/154746