[clang-tools-extra] [clang-tidy][NFC] run clang-format over clang-tidy checks and tool code. (PR #143324)

[via cfe-commits]

EugeneZelenko wrote:

> > Maybe same should be doe for Clang-Tidy?
> 
> It should already be in place, but like stated above, sometimes the CI checks don't run automatically, it requires a maintainer to click a button to trigger them. I don't know why this is, maybe based on CI load, but good to keep in mind. It does say that in the list of checks, like "4 checks waiting to be triggered".

I did not mean CI. `polly` regular CMake build fails if code is not formatted properly.

https://github.com/llvm/llvm-project/pull/143324