Merge pull request kubernetes#73787 from soltysh/deprecate_export

Deprecate --export flag from get command

Author: k8s-ci-robot

pkg/kubectl/cmd/get/get.go

@@ -178,6 +178,7 @@ func NewCmdGet(parent string, f cmdutil.Factory, streams genericclioptions.IOStr
 	addOpenAPIPrintColumnFlags(cmd, o)
 	addServerPrintColumnFlags(cmd, o)
 	cmd.Flags().BoolVar(&o.Export, "export", o.Export, "If true, use 'export' for the resources.  Exported resources are stripped of cluster-specific information.")
+	cmd.Flags().MarkDeprecated("export", "This flag is deprecated and will be removed in future.")
 	cmdutil.AddFilenameOptionFlags(cmd, &o.FilenameOptions, "identifying the resource to get from a server.")
 	return cmd
 }