Stop using `infra.runATH` (#7397)
* Stop using `infra.runATH` * Forget execute bit https://github.com/jenkinsci/jenkins/pull/7397#discussion_r1024934609 * Apply suggestions from code review Co-authored-by: Damien Duportal <damien.duportal@gmail.com> * More legible to read commands from a here-doc https://github.com/jenkinsci/jenkins/pull/7397#discussion_r1024933518 * May as well split up `run.sh` args by line too * Spell out Bash options https://github.com/jenkinsci/jenkins/pull/7397#discussion_r1025152483 Co-authored-by: Damien Duportal <damien.duportal@gmail.com>