[clang-tools-extra] [clang-tidy] Add llvm-type-switch-case-types check (PR #177892)

[via cfe-commits]

EugeneZelenko wrote:

> @EugeneZelenko here are the LLVM warnings -- it's actually much fewer than I expected. I can get those fixed after I land so that we don't have to disable the check: https://gist.github.com/kuhar/3092aa2b13ad8d4ce46a2bd1f1055406.
> 
> Does landing this as-is and then immediately posting a couple PRs to apply the fixits seem reasonable?

I think it'll be better to fix warnings first.

https://github.com/llvm/llvm-project/pull/177892