allow setting of hostNetwork for the node ds

[nwsparks]

Is this a bug fix or adding new feature?

feature

What is this PR about? / Why do we need it?

allows configuration of the hotstNetwork setting for the node daemonset. This behavior is desired, but can be problematic for existing deployments. Some background:

#1179
#1127

Providing the option is beneficial for new installs, or people willing to resolve the mount problems when changing modes.

[linux-foundation-easycla]

• ✅login: nwsparks / (32eb3ac)

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: nwsparks
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[alfredkrohmer]

Referring to my comment here: my understanding is that if hostNetwork: false, every upgrade of the DaemonSet that replaces the pods will break existing mounts. IMHO this option should only be provided with a clear warning that existing mounts will break if the DaemonSet pod is recreated and that this could be circumvented by choose an updateStrategy of OnDelete (and never manually deleting the DaemonSet pods).