fix(helm): fix 'werf helm *' commands to correctly initialize namespa…

…ce; fix output

* Initialize global 'werf helm *' flags early, the same way as original helm does.
* Fix 'werf helm PLUGIN' not uses --namespace param.
* Fix 'werf helm *' commands not to print help on command failure.

Fixes #4524

Signed-off-by: Timofey Kirillov <timofey.kirillov@flant.com>

cmd/werf/helm/helm.go

@@ -41,8 +41,9 @@ func NewCmd() *cobra.Command {
 	actionConfig := new(action.Configuration)
 
 	cmd := &cobra.Command{
-		Use:   "helm",
-		Short: "Manage application deployment with helm",
+		Use:          "helm",
+		Short:        "Manage application deployment with helm",
+		SilenceUsage: true,
 	}
 
 	ctx := common.GetContext()
@@ -207,6 +208,9 @@ func NewCmd() *cobra.Command {
 		}
 	}
 
+	cmd.PersistentFlags().ParseErrorsWhitelist.UnknownFlags = true
+	cmd.PersistentFlags().Parse(os.Args[1:])
+
 	return cmd
 }