Remove global metrics registration in init, add registration func

Signed-off-by: austin ce <austin.cawley@gmail.com>

pkg/metrics/workqueue.go

@@ -95,10 +95,20 @@ func init() {
 	Registry.MustRegister(unfinished)
 	Registry.MustRegister(longestRunningProcessor)
 	Registry.MustRegister(retries)
+}
 
+// SetDefaultGlobalWorkqueueMetricsProvider registers the GlobalWorkqueueMetricsProvider
+// as the global workqueue.MetricsProvider.
+func SetDefaultGlobalWorkqueueMetricsProvider() {
 	workqueue.SetProvider(workqueueMetricsProvider{})
 }
 
+// GlobalWorkqueueMetricsProvider constructs a workqueue.MetricsProvider
+// that registers metrics in the global Registry.
+func GlobalWorkqueueMetricsProvider() workqueue.MetricsProvider {
+	return workqueueMetricsProvider{}
+}
+
 type workqueueMetricsProvider struct{}
 
 func (workqueueMetricsProvider) NewDepthMetric(name string) workqueue.GaugeMetric {