[clang-tools-extra] [clang-tidy] Don't print `Enabled checks:` by default (PR #185229)

[Nicolas van Kempen via cfe-commits]

nicovank wrote:

> If anything it could print the list once at the very beginning of the CI run, but not for each .cpp file.

I believe this is already the case.

https://github.com/llvm/llvm-project/pull/185229