Switch to oaas / osbuild-worker-executor (HMS-4097)

[croissanne]

This simplifies the way the worker-executor, there's only 3 http calls happening: wait until ready, post for a build, get for the results.

[mvo5]

Just as a quick drive-by comment, it might be nice if the first commit with the copy of oaas also points to the original repo url in the description (that will then be archived). Just so that the git history is complete.

[mvo5]

Thanks for working on this! I'm very excited! I did a quick runthrough and added some small sugestions/ideas, mostly drive-by. Super happy to help out here too, I would love for example to write some tests for runner-impl-aws-ec2.go :)

[mvo5]

Thank you! This looks really nice!

[mvo5]

Still looks good (after the rebase)

[croissanne]

@mvo5

-       if err := run(ctx, os.Args[1:], os.Getenv, logger); err != nil {
+       if err := run(ctx, os.Args, os.Getenv, logger); err != nil {
                fmt.Fprintf(os.Stderr, "%s\n", err)
                os.Exit(1)
        }

got applied in the rebase again, reverted that, not sure where ._.

[mvo5]

Thank you!