Check for improper ctypes in all "stable ABIs"

[hanna-kruppe]

We should also run the lint for other stable (non-rustc-specific) ABIs such as win64, sysv, aapcs, interrupt ABIs, etc.

[cuviper]

Do you have an example that doesn't check? In #64641 I specifically excluded Rust ABIs from the check, because before it was checking all extern blocks regardless of chosen ABI. Maybe there's another path that's checking differently.

[hanna-kruppe]

Hm, it might very well have been a code path that was only introduced in #65134 (I turned a review comment there into this issue). So I'll close this now.