Add binary files to stubgen blacklisted path

[Avasam]

Add binary files to stubgen blacklisted path. .so for Linux and macOS. .dll for Windows. Fixes #14028

References: https://github.com/python/typeshed/tree/main/stubs/pywin32 and https://github.com/python/typeshed/tree/main/stubs/tree-sitter-languages/%40tests

[Avasam]

I'm not convinced whether this is the right approach. And as can be seen in the tree-sitter-languages stub, it might be good if stubtest also didn't try to parse .so files (?)

[hauntsaninja]

I'm not sure this is the right approach. I opened an alternative here: https://github.com/python/mypy/pull/14503 I don't have access to a Windows system, mind confirming whether that fixes?

[hauntsaninja]

Closing, since Jukka merged the other one. But please let me know if it doesn't work for you!

[Avasam]

Just tried latest master and it works fine :)