[clang-tools-extra] [run-clang-tidy.py] Add option to ignore source files from compilation database (PR #82416)

[Alexander Scholz via cfe-commits]

duddel wrote:

> > Why "ignore" instead of "filter"?
> 
> Why can't we make "filter" use a full regex that supports negative expressions instead?

We can. I provide a patch that inverts the logic (`-source-filter`), so it is aligned with `-header-filter`.

https://github.com/llvm/llvm-project/pull/82416