Add back Alpine 3.19 Arm32 9.0 Preview images

[lbussell]

https://github.com/dotnet/runtime/issues/100536 is fixed so these images should be added back to this repo. This commit can be reverted: https://github.com/dotnet/dotnet-docker/commit/05f4c58ab4581bb5834c073b5e63403fa928b836

There is also a workaround (https://github.com/dotnet/runtime/issues/100536#issuecomment-2050739818) so we could conceivably publish Preview 3 images with this env var set. It may not worth the return on investment though.