Support custom node labelling for MIG automation

[RJaliliSTFC]

Allow labelling for node deployments.

We are trying to deploy GPU nodes with custom labels on specific node groups so that they can have MIG enabled on deployment, removing the need to manually label each node.

We attempted to edit charts/openstack-cluster/templates/node-group/openstack-machine-template.yaml
Moving labels into template:spec, as follows;

    labels:
      {{- include "openstack-cluster.componentLabels" (list $ "worker") | nindent 4 }}
      {{ $.Values.projectPrefix }}/node-group: {{ $nodeGroup.name }}
      {{ toYaml . | nindent 6 }}
      {{- end }}
      {{- with $nodeGroup.extraLabels }}

With this code we got the error:

Error: UPGRADE FAILED: parse error at (openstack-cluster/templates/node-group/openstack-machine-template.yaml:39): undefined variable "$nodeGroup"

We also attempted to just move the pre-existing code into the template spec:

  labels:
    {{- include "openstack-cluster.componentLabels" (list $ "worker") | nindent 4 }}
    {{ $.Values.projectPrefix }}/node-group: {{ $nodeGroup.name }}

And got the error:

Error: UPGRADE FAILED: template: openstack-cluster/templates/node-group/openstack-machine-template.yaml:56:11: executing "openstack-cluster/templates/node-group/openstack-machine-template.yaml" at <include "openstack-cluster.nodegroup.mt.name" (list $ $nodeGroup)>: error calling include: template: openstack-cluster/templates/node-group/openstack-machine-template.yaml:46:17: executing "openstack-cluster.nodegroup.mt.name" at <include "openstack-cluster.nodegroup.mt.checksum" .>: error calling include: template: openstack-cluster/templates/node-group/openstack-machine-template.yaml:40:4: executing "openstack-cluster.nodegroup.mt.checksum" at <include "openstack-cluster.nodegroup.mt.spec" .>: error calling include: template: openstack-cluster/templates/node-group/openstack-machine-template.yaml:35:10: executing "openstack-cluster.nodegroup.mt.spec" at <include "openstack-cluster.componentLabels" (list $ "worker")>: error calling include: template: openstack-cluster/templates/_helpers.tpl:62:3: executing "openstack-cluster.componentLabels" at <include "openstack-cluster.commonLabels" (index . 0)>: error calling include: template: openstack-cluster/templates/_helpers.tpl:28:18: executing "openstack-cluster.commonLabels" at <include "openstack-cluster.chart" .>: error calling include: template: openstack-cluster/templates/_helpers.tpl:21:25: executing "openstack-cluster.chart" at <.Chart.Name>: can't evaluate field Chart in type []interface {}

• Is there something simple I'm missing to get this working?
• Is this a change you'd be happy to accept?