Add flags

[brandon-bethke-timu]

Changes and Fixes

• Added support to pass --runnergroup flag to config.sh when installing the runner software. The flag is configured using a terraform variable github_runner_group and the default values is "".

• Added support to configure the runner VM max_run_duration using a terraform variable github_runners_max_run_duration. The value is specified in seconds. The default is (86400 * 5) + 300

• Renamed the runners from runner-{instance_uuid} to gcp-runner-{instance_uuid}. This allows runners to be more easily identified in github for maintenance. Also, and perhaps more importantly, _handle_completed_jobwill now be able to identify and shut down VMs for gcp runners and not unrelated runners.

• webhook_service.py _handle_completed_job: Only shutdown VMs from runners whose name starts with gcp-runner-

• The VM startup_script will now cd into the runner-actions folder before executing run.sh. This solves ldd: ./bin/libcoreclr.so: No such file or directory and two other No such file or directory errors. Changing directories into the runner-actions folder is the formal procedure when installing the runner software.