BLO-4373-enable-multi-arch-builds-for-gitops-action

[kaitimmer]

Type of Change

• Bugfix
• Enhancement / new feature
• Refactoring
• Documentation

Description

• Allows to provide a docker-build-platforms setting (can be 'linux/amd64, linux/arm64')
• Checks if the runner is matching the target architecture. If not, it stops the run because emulation is to slow (see: https://github.com/Staffbase/apperator/actions/runs/21686504932)
• It also fixes the retagging step, which was not able to deal with multi-arch images before (used in backend by jib).

Checklist

• Write tests
• Make sure all tests pass
• Update documentation
• Review the Contributing Guideline and sign CLA
• Reference relevant issue(s) and close them after merging