[clang-tools-extra] [clang-tidy] treat fragment includes as main-file parts (PR #180282)

[Daniil Dudkin via cfe-commits]

unterumarmung wrote:

I ran this on a small project of mine that includes TableGen-generated files, and with this patch misc-include-cleaner works great in that setup. I’d really like to get this merged — I believe it’s a key step toward making the check usable on LLVM itself. Once this lands, I’d like to follow up by enabling the same behavior in clangd and clang-include-cleaner.

I’m not sure whether @kadircet is planning to review this, since they’ve removed themselves from the clangd maintainers list.
@vbvictor — could you suggest an alternative reviewer for this change?
@zeyi2 — since you reviewed earlier iterations, would you mind taking another quick look?

https://github.com/llvm/llvm-project/pull/180282