Merge commit from fork

* Split bot lint comment in two

* Use curl to download script after artifact has been downloaded

* Use actions/checkout with sparse checkout and clean-up variable usage

* runner.temp is not defined at job level somehow ...

* fix

* Better error when PR_NUMBER is not a number

* Control PR number from workflow_run than leaving it to the user

* remove debug

* tweak

* Remove unneeded pr_number.txt artifact

Author: lesteve