feature(scheduler): implement plugin_evaluation_total metric

pkg/scheduler/framework/runtime/framework.go

@@ -734,6 +734,7 @@ func (f *frameworkImpl) RunFilterPlugins(
 		if state.SkipFilterPlugins.Has(pl.Name()) {
 			continue
 		}
+		metrics.PluginEvaluationTotal.WithLabelValues(pl.Name(), Filter).Inc()
 		if status := f.runFilterPlugin(ctx, pl, state, pod, nodeInfo); !status.IsSuccess() {
 			if !status.IsUnschedulable() {
 				// Filter plugins are not supposed to return any status other than