Manage observability at entrypoint and router level

Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>

pkg/provider/kubernetes/crd/traefikio/v1alpha1/zz_generated.deepcopy.go

@@ -1102,6 +1102,11 @@ func (in *Route) DeepCopyInto(out *Route) {
 		*out = make([]MiddlewareRef, len(*in))
 		copy(*out, *in)
 	}
+	if in.Observability != nil {
+		in, out := &in.Observability, &out.Observability
+		*out = new(dynamic.RouterObservabilityConfig)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }