Adding resource limits to the services deployed by KFD

[woopla]

Is your feature request related to a problem? Please describe.
After installing a KFD cluster, we want to validate it for correctness, so we ran popeye. Among the things reported by the tool, there's a descent amount [POP-106] No resources requests/limits defined messages. This is preventing accurate resource monitoring, and cluster autoscaling down the line.

Describe the solution you'd like
All the modules should have default limits, which can be overridden.

Describe alternatives you've considered
It should be possible to post-process with kubectl set resources, but having a properly vetted set of defaults is always better.