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

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

I agree tools should typically not be so verbose by default. The only time one needs to see it is when setting up/troubleshooting CI, but not the many more times that CI runs.

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

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