Add arm32 releases

[patrickelectric]

Such boards are still around and getting popular with 8usd boards

[mgoltzsche]

I tried that here 5 years ago when I played with the thought of running Podman on a Raspberry Pi Zero but gave up on that due to too many problems (currently I don't remember which ones in particular but there were good reasons for giving up on that).
I recommend to buy a used Raspberry Pi 3B+ or similar (which is what I did).
Even if you'd make the arm32 build work, I wouldn't be in favour of maintaining it since the emulated arm64 build already takes ages and comes with its own maintenance problems occasionally. A 32bit build comes with a lot more problems than just the emulation and occasional differences between arm64 and amd64 package variants. Essentially the cost of maintaining an arm32 build is many times higher than the few dollars/euros you'd save with the smaller 32bit board which is why it is not worth it from my point of view.