Resolve "No ServiceAccount option available for gluon script jobs"

General MR

Summary

While the cypress half of gluon's testing functionality provides a cypress-specific ServiceAccount in _cypressutils.yaml and then uses it in _cypressrunner.yaml there is not currently a matching ServiceAccount option for the scripts/tests/* jobs. The _scriptrunner.yaml does not specify a serviceAccountName in its Pod spec and so there's nowhere to hang custom permissions for our test scripts.

Relevant logs/screenshots

N/A

Linked Issue

issue

Upgrade Notices

N/A

Closes #40 (closed)