scheduled workflow: Support multi-arch

[furushchev]

Hi!
This PR introduces Arm64 architecture support for scheduled workflows in GitHub Actions in addition to x64.
I hope this change will reduce some toil of the maintainer for the deployment.

Notes:
The use of sg on the Ubuntu Arm64 runners fails because it requires password inputs.
https://github.com/furushchev/ros-builder-action/actions/runs/13248229556/job/36979770116#step:6:6145

I changed the src/build.sh to use sudo instead of sg for running sbuild command.

[rhaschke]

Is Arm64 support publicly available on GHA now?
Last year, when I set that up, I had to resort to self-hosted runners.
Please, add an ARM job to the unittests in ci.yaml

[rhaschke]

Why did you factor out the actual build rules? scheduled_job.yaml is not used elsewhere, is it?

[furushchev]

From what I've researched, it seems that the function to execute the deploy job upon success for each of the matrix-ized Jobs in Github Actions has not been implemented.
Therefore, I've decided to create a set of the jobs for each element of the matrix (build) and the deploy job as a reusable workflow, and then put that workflow job into a matrix.

[furushchev]

ref. https://github.com/orgs/community/discussions/26639

[furushchev]

@rhaschke

Is Arm64 support publicly available on GHA now?
Last year, when I set that up, I had to resort to self-hosted runners.
Please, add an ARM job to the unittests in ci.yaml

It is now available as public preview.
https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
I updated the ci.yaml to enable the test on ARM. 👍

[rhaschke]

Deployment works: https://github.com/ubi-agni/ros-builder-action/actions/runs/13249590857.

[furushchev]

@rhaschke Thank you for checking the scheduled workflow!

I think now it's ready for your review (and merge).

[rhaschke]

After having cleaned up this a little bit, I approach. Thanks for your effort!