Support provisioning nginx as DaemonSet

[sjberman]

As a user of NGF
I want the ability to provision nginx as a DaemonSet in my cluster
So that I can ensure at least one is running on every node to achieve very high availability within my cluster.

Acceptance

• Support deploying nginx as a DaemonSet instead of a Deployment
• Only one type is allowed to be configured at any time
• Supports the same container/pod fields as the Deployment config supports

Dev Notes

• Provisioning mode will default to Deployment, but we should also support deploying nginx as a DaemonSet

[mpstefan]

What use case does this help enable?

[sjberman]

This could mainly help with availability when certain nodes go down, you know that you'll have nginx running on any living nodes.