feat(k8s): introduce new flag waitForJobs to wait for k8 jobs

[shumailxyz]

What this PR does / why we need it:
Introduces a new flag waitForJobs that can be set on the kubernetes deploy to wait for the jobs to be finished.

example:

kind: Deploy
type: kubernetes
name: job-long
spec:
  waitForJobs: true
  files:
    - ./job-long.yaml

Which issue(s) this PR fixes:

Fixes #4557

Special notes for your reviewer:

[edvald]

I think this is sensible behavior but this is technically a breaking change. It's quite possible that there are usages which rely on the current behavior. You might argue that we should still do this given the state of transition to 0.13 across the user base, but it's debatable.

An alternative would be to add a flag (e.g. spec.waitForJobs: true) to control the behavior more explicitly. If we do that, we can make a note to make the breaking change in 0.14, basically flipping the default value of that field.

If we do actually choose to make the breaking change, that would need to be clearly documented in 0.13 notes and migration guide etc.

[vvagaytsev]

👍