[clang-tools-extra] [clang-tidy][NFC] Add empty .clang-tidy in tests to warnings in ide (PR #171029)

[via cfe-commits]

zeyi2 wrote:

This is mostly just a hypothesis for now.

I think the Windows fails because `clang-tools-extra/test/clang-tidy/infrastructure/Inputs/param/parameters.txt` incorrectly uses single quotes for the -checks argument.

On Windows, the argument is [parsed](https://github.com/llvm/llvm-project/blob/fb0400fe1f1f9e83f3148db8ce2c72ab5bc6728e/llvm/lib/Support/CommandLine.cpp#L940) as a check named `' -*,llvm-namespace-comment '`, which matches no existing checks, so no checks are enabled via the command line.

Previously, the test passed because it fell back to the root `.clang-tidy` configuration which enables `llvm-*`.

I'll open a PR to fix the issue in `parameters.txt` first.

https://github.com/llvm/llvm-project/pull/171029