Update auto deploy to be runnable on kubeflow-ci.

[gabrielwen]

Remaining tasks:

• Add github repos (kubeflow/testing) version snapshot.
• Dockerfile dependencies clean up.
• Deployed clusters labeling (used to identify the time deployment is made)
• Add service account role bindings garbage collection to workflow.
• Add a workflow to create git PR.

---

This change is 

[gabrielwen]

Relates to #95

[gabrielwen]

/assign @jlewi

[jlewi]

Thanks.

nit: Would you mind updating the PR with comments explaining what changes were needed.

[gabrielwen]

Changes include:

• Move workflows args from Dockerfile to cronjob config. This way we don't need to rebuild the whole image for args.
• disentangle worker instantiation with github repos. Worker init process is generic enough that we should not need to change it often - Just pull fresh copy of kubeflow and testing repo and start create_kf_instance. This way we also don't need to rebuild worker image when we need to push out a new version - worker uses the what's on Github.
• Disable deployment deletion. Need to figure out if it's needed and permissions to run it.

[gabrielwen]

Thanks.

nit: Would you mind updating the PR with comments explaining what changes were needed.

Added :)

[gabrielwen]

/retest all

[jlewi]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jlewi

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [jlewi]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment