AMO-238

[KevinMind]

Relates to: AMO-238

Descripton

This PR is the first iteration of migrating our CircleCI jobs to github action workflows, specifically the "assets" job.

Context

If we model our CI workflows falling into 4 phases of the CI/CD process, the phase of "test" is where most of our circleci jobs and the existing "verify-docker-image" workflow fall.

Testing

I will break the assets job, and we should expect both circleci and github action to fail for the same reason.

[KevinMind]

Files created in the docker build still have 9500 owner, when we run fix_olympia_user we modify the olympia user and group but not files owner by the 9500 user/group

https://github.com/mozilla/addons-server/actions/runs/8453429444/job/23156072525?pr=22085