reset user's ZDOTDIR if shell integration is disabled (microsoft#158132)

fix 157128

Author: meganrogge

src/vs/workbench/contrib/terminal/browser/media/shellIntegration-rc.zsh

@@ -6,6 +6,7 @@ builtin autoload -Uz add-zsh-hook
 
 # Prevent the script recursing when setting up
 if [ -n "$VSCODE_SHELL_INTEGRATION" ]; then
+	ZDOTDIR=$USER_ZDOTDIR
 	builtin return
 fi