[clang] [clang-format] Skip PP directives when determining brace kind (PR #69473)

[Owen Pan via cfe-commits]

owenca wrote:

> I didn't expect you to not want to be credited, but I'll respect your opinion!

I meant you didn't need to add me to the authorship. 🙂 Anyway, I do appreciate it and think you should be the only author.

> GitHub adds co-ownership automatically if using the web ui to commit a suggestion (which is what happened in that other PR you pinged me in), but in this case I did add it manually :)

Ah, I didn't know that. Thanks for letting me know!

https://github.com/llvm/llvm-project/pull/69473