feat: build dashboard for all the mixins kubeaid supports

build/kube-prometheus/common-template.jsonnet

@@ -816,4 +816,5 @@ local kp =
 (if std.objectHas(vars, 'grafana_ingress_host') then { [name + '-ingress']: kp.ingress[name] for name in std.objectFields(kp.ingress) } else {}) +
 (if std.objectHas(vars, 'prometheus_ingress_host') then { [name + '-ingress']: kp.ingress[name] for name in std.objectFields(kp.ingress) } else {}) +
 // Rendering prometheusRules object. This is an object compatible with prometheus-operator CRD definition for prometheusRule
+{ [o._config.name + '-grafana-dashboards']: o.grafanaDashboards for o in std.filter((function(o) o.grafanaDashboards != null), mixins) } +
 { [o._config.name + '-prometheus-rules']: o.prometheusRules for o in std.filter((function(o) o.prometheusRules != null), mixins) }