rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

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

vendor/k8s.io/utils/strings/escape.go

@@ -1,36 +0,0 @@
-/*
-Copyright 2014 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package strings
-
-import (
-	"strings"
-)
-
-// EscapeQualifiedName converts a plugin name, which might contain a / into a
-// string that is safe to use on-disk.  This assumes that the input has already
-// been validates as a qualified name.  we use "~" rather than ":" here in case
-// we ever use a filesystem that doesn't allow ":".
-func EscapeQualifiedName(in string) string {
-	return strings.Replace(in, "/", "~", -1)
-}
-
-// UnescapeQualifiedName converts an escaped plugin name (as per EscapeQualifiedName)
-// back to its normal form.  This assumes that the input has already been
-// validates as a qualified name.
-func UnescapeQualifiedName(in string) string {
-	return strings.Replace(in, "~", "/", -1)
-}