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/client-go/tools/clientcmd/api/v1/register.go

@@ -37,7 +37,7 @@ func init() {
 	// We only register manually written functions here. The registration of the
 	// generated functions takes place in the generated files. The separation
 	// makes the code compile even when the generated files are missing.
-	localSchemeBuilder.Register(addKnownTypes, addConversionFuncs)
+	localSchemeBuilder.Register(addKnownTypes)
 }
 
 func addKnownTypes(scheme *runtime.Scheme) error {