[clang-tools-extra] [clang-tidy] add option to avoid "no checks enabled" error (PR #96122)

[Congcong Cai via cfe-commits]

HerrCai0907 wrote:

> if a reason for this parameter is not to fail wrapper scripts, then maybe run-clang-tidy.py / run-clang-tidy-diff.py should also be updated.

Both of them is fine because they only count the failed file and don't do any check about failure.

https://github.com/llvm/llvm-project/pull/96122