build: update action to close stale PRs
My original plan of adding a lable to limit those initially process as outlined in https://github.com/nodejs/node/pull/48051 does not work I think because adding a lable updates the last update time.
- Removing the need for the lable
- Remove the cron scheduling so that it only runs when I run it manually
- Fix the display name for the action as I missed updating that after cut and paste from existing action
The plan will be to find stop dates that should only affect a reasonable number of PRs at a time and then run in batches using that instead.