Remove build of boards with deprecated architectures #4372
Description
Starting with HA Core 2025.12.0 (including dev), there won’t be no build for 32bit archs anymore. OS should logically not build new development builds using the old images anymore. The removal was announced in https://www.home-assistant.io/blog/2025/05/22/deprecating-core-and-supervised-installation-methods-and-32-bit-systems/