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

[Nicolas van Kempen via cfe-commits]

nicovank wrote:

You're right -- it's already being run, but only on the changed lines, not the entire file. Either way, it should cover future diffs minus rare weird edge cases.

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