Add functionality to be able to run lagoon-facts in a custom task.

[bomoko]

Currently, we assume that lagoon-facts is going to be run inside a cli pod.
In moving to custom tasks, we could run lagoon-facts in cli pods/services - however, there is the possibility that a project doesn't use the cli service.
In this case, we'd still like to be able to run lagoon-facts.

To this end, it would be good to be able to run this app in a custom task. Specifically, it would be good to be able to run these as a custom image.

To this end, we'd like to enhance the lagoon-facts app to

1. Make facts K8S aware (so we can load access tokens and list services in the current namespaces)
2. where gatherers run, we need to be able to support either running directly in the current environment (how it currently works) OR exec'ing into running containers.

This will allow us to run gathers in multiple contexts (either directly in a collection environment or by execing into running environments from a task)