- What I did

If two lkt processes attempt to create a builder container at the same time, they both do an inspect, it fails, so they both try to create. The first one succeeds, the second one gets a name conflict and fails. Handle that situation.

- How I did it

Add a retry loop. After a create fails, try it again after one second, up to 3 times.

- How to verify it

I did it manually by stopping the code right before the "create" clause, started a second process, let it create, and then continued the first. Before this it failed, with this it works. And, of course, CI will catch regressions.

- Description for the changelog

Handle builder container process starting in parallel.