Build docker images for arm (aarch64)

[aktech]

Fixes #821

Description

This pull request:

• Add another matrix item in the CI to build docker images for arm.

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

Additional information

How to test

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[trallard]

@aktech this has been in WIP for a bit. Are you planning to continue to work on this PR?

[aktech]

Yes. The windows test failure is unrelated: https://github.com/conda-incubator/conda-store/actions/runs/9006701345/job/25302259825?pr=822

and the docker image build got stalled, needs to be re-triggered.

The docker image built fine on my fork: https://github.com/aktech/conda-store/actions/runs/9003040226/job/24732748267

[aktech]

also, would need workflow trigger approval (potentially multiple times) to make it green

[peytondmurray]

Updated branch to trigger workflows, let's see if we can get this merged.

[aktech]

This is ready for review, CI is green now.

[marcelovilla]

Thanks @aktech 🚀 !

[marcelovilla]

@peytondmurray is there any reason not to approve this? I see you added the needs: discussion label.

[peytondmurray]

Nope, I'll merge it now - that label as added so I could easily filter for it during today's meeting.

[peytondmurray]

🚀 Thanks for this!