[clang] [Tooling] Fix misleading progress report when files have multiple compile commands (PR #169640)

[via cfe-commits]

zeyi2 wrote:

> It'd be easier on reviewers to back those unrelated changes out so we can more easily see just what's been materially modified.

Sorry for the noise, I've cleanup the modification in `ToolingTest.cpp`. Please take another look when you have time. Thanks for your time and patience.



https://github.com/llvm/llvm-project/pull/169640