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/api/meta/OWNERS

@@ -17,11 +17,7 @@ reviewers:
 - eparis
 - dims
 - krousey
-- markturansky
-- fabioy
 - resouer
 - david-mcmahon
 - mfojtik
 - jianhuiz
-- feihujiang
-- ghodss