Add bindgen by default if the OS needs to rebuild it

[LecrisUT]

Problem:

My understanding is that for normal OS and architectures, there are pre-compiled artifacts so bindgen is not always necessary. But for cases like the illumos OS, this is always needed right now. It would be nice if the default added the bindgen feature by default in those cases.

Relevant details

Example workflow: https://github.com/LecrisUT/atuin/actions/runs/14284306119/job/40037527900