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/apimachinery/pkg/runtime/zz_generated.deepcopy.go

@@ -73,36 +73,3 @@ func (in *Unknown) DeepCopyObject() Object {
 	}
 	return nil
 }
-
-// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
-func (in *VersionedObjects) DeepCopyInto(out *VersionedObjects) {
-	*out = *in
-	if in.Objects != nil {
-		in, out := &in.Objects, &out.Objects
-		*out = make([]Object, len(*in))
-		for i := range *in {
-			if (*in)[i] != nil {
-				(*out)[i] = (*in)[i].DeepCopyObject()
-			}
-		}
-	}
-	return
-}
-
-// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new VersionedObjects.
-func (in *VersionedObjects) DeepCopy() *VersionedObjects {
-	if in == nil {
-		return nil
-	}
-	out := new(VersionedObjects)
-	in.DeepCopyInto(out)
-	return out
-}
-
-// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new Object.
-func (in *VersionedObjects) DeepCopyObject() Object {
-	if c := in.DeepCopy(); c != nil {
-		return c
-	}
-	return nil
-}