Support building wheels with cross

[messense]

https://github.com/cross-rs/cross

It's useful for cross compiling to FreeBSD, NetBSD, illumos and other operating systems given that zig cc currently doesn't have good support for them.

zig cc support status:

• add FreeBSD libc as a cross compilation target ziglang/zig#2876
• add OpenBSD libc as a cross compilation target ziglang/zig#2878
• add NetBSD libc as a cross compilation target ziglang/zig#2877
• Tier System: x86_64-dragonfly ziglang/zig#7149
• Tier System: x86_64-illumos ziglang/zig#7152
• Tier System: x86_64-haiku ziglang/zig#7691