1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/k8s.io/api/node/v1alpha1/zz_generated.deepcopy.go

@@ -116,6 +116,11 @@ func (in *RuntimeClassSpec) DeepCopyInto(out *RuntimeClassSpec) {
 		*out = new(Overhead)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.Scheduling != nil {
+		in, out := &in.Scheduling, &out.Scheduling
+		*out = new(Scheduling)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 
@@ -128,3 +133,33 @@ func (in *RuntimeClassSpec) DeepCopy() *RuntimeClassSpec {
 	in.DeepCopyInto(out)
 	return out
 }
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Scheduling) DeepCopyInto(out *Scheduling) {
+	*out = *in
+	if in.NodeSelector != nil {
+		in, out := &in.NodeSelector, &out.NodeSelector
+		*out = make(map[string]string, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+	}
+	if in.Tolerations != nil {
+		in, out := &in.Tolerations, &out.Tolerations
+		*out = make([]v1.Toleration, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Scheduling.
+func (in *Scheduling) DeepCopy() *Scheduling {
+	if in == nil {
+		return nil
+	}
+	out := new(Scheduling)
+	in.DeepCopyInto(out)
+	return out
+}