Component: Queues/Workers

[StachuDotNet]

This Issue exists to collect many items that relate to "Queues/Workers" in Darklang.
In Darklang-classic, queues only existed in our Cloud runtime (since that was the only runtime), but going forward we should have them supported for the Local/CLI runtime as well.

• uncomment the _events.dark test file. (This was quite flaky in CI, but we decided to put addressing that for a bit, and have uncommented this until we have some focus on queues/workers)
• in Tests.fs, uncomment the usage of Queue.Tests.fs
• bring back Queues, in some minimal capacity
  • why is the issue happening:
    • we clear the Queue DB
    • we add a message to check if the queue exists
    • multiple servers are doing that same thing
• add timelimit for queue execution
  • the goal here is to limit the execution of an item on the queue
  • To end computation that runs over (lets say) 3 minutes. I'm not sure it's possible without adding cancellation tokens everywhere - maybe that's what we'll need to do?
• Workers should be typed
• emit's arg should be real worker name/reference, not a string
• worker counts should work
• it should be clearer if a worker is paused
• workers should have dead-letter queues
• review Rollbar: "Deadline Exceeded" (Rollbar: "Deadline Exceeded" #3815)
• disable workers which do nothing (see disable crons and workers which do nothing #3958)

[StachuDotNet]

(This has just been extracted out of #5261)