Use client-go to deploy & wait rather than shell scripts

[mattcary]

deploy/kubernetes and test/k8s-integration share some bash scripts for deploying the driver as well as waiting for the deployment to be ready (deploy/kuberntetes/wait-for-deploy.sh; test/k8s-integration/prepull-image.sh).

We should move as much of that as possible to client-go and do it in code rather than shell scripts which are much harder to test & maintain.

[fejta-bot]

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/lifecycle stale

[mattcary]

/remove-lifecycle stale

[fejta-bot]

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Stale issues rot after an additional 30d of inactivity and eventually close.

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/lifecycle stale

[fejta-bot]

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/lifecycle rotten

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/close

[k8s-ci-robot]

@fejta-bot: Closing this issue.

In response to this:

Rotten issues close after 30d of inactivity.
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/close

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