rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/client-go/tools/auth/clientauth.go

@@ -75,11 +75,11 @@ import (
 // to be read/written from a file as a JSON object.
 type Info struct {
 	User        string
-	Password    string
+	Password    string `datapolicy:"password"`
 	CAFile      string
 	CertFile    string
 	KeyFile     string
-	BearerToken string
+	BearerToken string `datapolicy:"token"`
 	Insecure    *bool
 }