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/line_delimiter.go

@@ -1,64 +0,0 @@
-/*
-Copyright 2015 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 (
-	"bytes"
-	"io"
-	"strings"
-)
-
-// LineDelimiter is a filter that will split input on lines
-// and bracket each line with the delimiter string.
-type LineDelimiter struct {
-	output    io.Writer
-	delimiter []byte
-	buf       bytes.Buffer
-}
-
-// NewLineDelimiter allocates a new io.Writer that will split input on lines
-// and bracket each line with the delimiter string.  This can be useful in
-// output tests where it is difficult to see and test trailing whitespace.
-func NewLineDelimiter(output io.Writer, delimiter string) *LineDelimiter {
-	return &LineDelimiter{output: output, delimiter: []byte(delimiter)}
-}
-
-// Write writes buf to the LineDelimiter ld. The only errors returned are ones
-// encountered while writing to the underlying output stream.
-func (ld *LineDelimiter) Write(buf []byte) (n int, err error) {
-	return ld.buf.Write(buf)
-}
-
-// Flush all lines up until now.  This will assume insert a linebreak at the current point of the stream.
-func (ld *LineDelimiter) Flush() (err error) {
-	lines := strings.Split(ld.buf.String(), "\n")
-	for _, line := range lines {
-		if _, err = ld.output.Write(ld.delimiter); err != nil {
-			return
-		}
-		if _, err = ld.output.Write([]byte(line)); err != nil {
-			return
-		}
-		if _, err = ld.output.Write(ld.delimiter); err != nil {
-			return
-		}
-		if _, err = ld.output.Write([]byte("\n")); err != nil {
-			return
-		}
-	}
-	return
-}