Skip digger if digger.yml if absent

[motatoes]

current behaviour if digger.yml is absent in a repo PR is that digger will try to automatically traverse folders and generate projects itself.

This behaviour should be changed to skip digger entirely and Noop, no comments left on PR. This is to avoid random failure messages appearing in a repo before it is actually setup

If a user wants digger to automatically discover and traverse projects the behaviour should be explicitly configured using generate_projects or others specified in a digger.yml

Applies to both backendless and orchestrator modes. Backendless job runs and Noops. Orchestrator: log something in backend and take no action in repo

Reported by NL