Corrective action: Update helmchart to configure which zones to deploy too for registry-cny

Summary

In production#8669 (closed) we saw one of the zones us-east1-d having high latency. For canary we had to disable all of canary backend because we couldn't evict the pods in us-east1-d and have the deployment only schedule the pods in us-east1-[c,b].

Related Incident(s)

Originating issue(s): production#8669 (closed)

Desired Outcome/Acceptance Criteria

• Update the official helmchart so that we can set nodeAffinity so that we can choose which regions we end up deploying too

Corrective Action Issue Checklist

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