Add support for node_config.resource_labels into the nodepool module

[fulyagonultas]

We call CFF nodepool upstream module and we have sentinel policy to check if every resource has labels. Node_config.resource_labels failed in the sentinel check as I see that we only have var.labels in CFF nodepool module but no resource_labels.

Please add resource_labels into node_config block.

[juliocc]

fixed with #2317