Helm chart does not allow setting `hostNetwork: false` for metallb speaker pods

Is your feature request related to a problem?

Hi there,

We run MetalLB with hostNetwork: false, but currently the helm chart gives us no way of tuning this parameter. This means we have to explicitly declare all the templates and keep them in sync upstream. Is there any way you could add this as a tunable parameter in the values.yaml file?

Many thanks.

Describe the solution you'd like

In values.yaml:

speaker:
  hostNetwork: false

Additional context

No response

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