ci: use podman gitlab-runner for multiarch builds

The build runs in two stages:

1. Cross compilation for target architecture on native arch image
2. Installation into target architecture image

It require actually a third stage to workaround an issue in podman/buildah: https://github.com/containers/buildah/issues/4742

Configuring a gitlab-runner with podman:

1. Follow this documentation: https://docs.gitlab.com/runner/executors/docker.html#use-podman-to-run-docker-commands
2. Install the crun and qemu-user-static packages

requested review from @moul

mentioned in merge request !150 (closed)

added RN-silent label

added C-cicd label

Great job! Looks good to me. I don’t get every details deep down, but that’s fine.

Things I didn’t knew before:

• Building Multi-Architecture Containers on OCI with Podman
• gitlab-ci: !reference tags

approved this merge request

added 2 commits

• 22345178 - 1 commit from branch master
• 8423ea0b - ci: use podman gitlab-runner for multiarch builds

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I've fixed the docker repository name in .gitlab-ci.yaml (pinidh -> duniter) and reverted the change related to LTO (files docker/Dockerfile and Cargo.toml).

resolved all threads

added 14 commits

• 8423ea0b...7a128091 - 13 commits from branch master
• 41b8c8f4 - ci: use podman gitlab-runner for multiarch builds

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added 3 commits

• 41b8c8f4...10170f2a - 2 commits from branch master
• 81e7dbf8 - ci: use podman gitlab-runner for multiarch builds

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added 2 commits

• 59111f8f - 1 commit from branch master
• d2da0626 - ci: use podman gitlab-runner for multiarch builds

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added 3 commits

• 54f04b41 - 1 commit from branch master
• 0261dca9 - ci: use podman gitlab-runner for multiarch builds
• 086da48e - ci: revert commit 54f04b41

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added 13 commits

• 086da48e...dabb2c09 - 11 commits from branch master
• 1e21ea2e - ci: use podman gitlab-runner for multiarch builds
• 95ebdfc4 - ci: revert commit 54f04b41

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merged