Add Concurrency GHA Feature to CI

[Techno Tim]

CI fails a lot, most of it is because the nature of our machines but some of it might be due to concurrency.

We might want to limit concurrency using this https://docs.github.com/en/actions/using-jobs/using-concurrency

• This will prevent new workflows from running until previous have completed.
• This will help when PRs are opened by a person or the bot
• This will help when someone pushes more commits to their branch

We might also want to consider running the individual jobs serially, rather than in parallel.

• This would only allow one job to run at a time

The upside is that this might help with build failures
The downside is that builds will take loner (but when they fail we have to manually intervene which takes the longest)

[Techno Tim]

this was fixed by #389.

we don't need concurrency now