Add ability to automatically cleanup the delete-agones-resources jobs after completion

[mikeseese]

Is your feature request related to a problem? Please describe.
When uninstalling an Agones release via helm, it creates a Job to force deleting other Agones resources if agones.crds.cleanupOnDelete is set to false.

Jobs, and their associated Pods, in Kubernetes inherently do not get deleted so that developers can review the outcome of the job. However, as this job is fairly autonomous it ends up feeling like more clutter than value to have the pods lingering until K8s garbage collection deletes them. This is exacerbated if you are bringing Agones releases up and down multiple times during development.

Describe the solution you'd like

Implementing the TTL mechanism for finished jobs would allow these jobs to be deleted after some period of time that could be configured as a chart value.

Describe alternatives you've considered

Users could create their own tooling/scripts to manually delete the jobs, or they could set agones.crds.cleanupOnDelete=false, but it would be ideal if Agones provided an interface to handle deleting completed jobs.

Additional context

Slack conversation here