[Metricbeat][Kubernetes] Enrich metadata from state resource quota

[constanca-m]

Unlike other state metricsets, resource quota does not have an enricher for its metadata:

beats/metricbeat/module/kubernetes/state_resourcequota/state_resourcequota.go

Lines 53 to 58 in ecaf12c

	type ResourceQuotaMetricSet struct {
	mb.BaseMetricSet
	prometheus p.Prometheus
	mapping *p.MetricsMapping
	mod k8smod.Module
	}

We should add a new variable for it like we do with other state metricsets:

beats/metricbeat/helper/kubernetes/state_metricset.go

Line 91 in d9139c9

enricher: util.NewResourceMetadataEnricher(base, resourceName, mod.GetMetricsRepo(), false),

This enricher is expected to make use of watchers tracking the resources namespace and resource quota.