Move plugin context events into separate plugin

Signed-off-by: Derek McGowan <derek@mcg.dev>

runtime/restart/monitor/monitor.go

@@ -63,6 +63,7 @@ func init() {
 	plugin.Register(&plugin.Registration{
 		Type: plugin.InternalPlugin,
 		Requires: []plugin.Type{
+			plugin.EventPlugin,
 			plugin.ServicePlugin,
 		},
 		ID: "restart",
@@ -95,8 +96,14 @@ func getServicesOpts(ic *plugin.InitContext) ([]containerd.ServicesOpt, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to get service plugin")
 	}
+
+	ep, err := ic.Get(plugin.EventPlugin)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get event plugin")
+	}
+
 	opts := []containerd.ServicesOpt{
-		containerd.WithEventService(ic.Events),
+		containerd.WithEventService(ep.(containerd.EventService)),
 	}
 	for s, fn := range map[string]func(interface{}) containerd.ServicesOpt{
 		services.ContentService: func(s interface{}) containerd.ServicesOpt {