[dcgm-exporter] Add option hostNetwork for dcgmExporter

[Alja9]

Is it possible to add the hostNetwork option to the dcgm-exporter via gpu-operator ?
because the dcgm-exporter itself already provides that option :
https://github.com/NVIDIA/dcgm-exporter/blob/8fd69339fe2138459d3618508c3ebb1f43b51f79/deployment/templates/daemonset.yaml#L49-L50

Why is this necessary? because the label on the dcgm-exporter metrics does not have a node label to display the node name, while the label provided by the dcgm-exporter that is possible to display the node name is only hostname (can use node name or pod name).

And I think this is useful for monitoring tools that require access to node-level network interfaces or need to expose ports directly on the node. And actually I want the dcgm-exporter to use the node IP as the pod IP instead of assigning its own IP or new IP (this helps to use node ip on value instance label).

And also it seems there is a request for this feature in the issue : #1086

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.

[github-actions]

This PR is stale because it has been open 90 days with no activity. This PR will be closed in 30 days unless new comments are made or the stale label is removed. To skip these checks, apply the "lifecycle/frozen" label.

[tariq1890]

@Alja9 Thank you for creating this PR and we apologise for missing this earlier. It looks like this PR #1962 has already been merged with the same changes.

We appreciate you taking the time to contribute to gpu-operator!