Add troubleshooting steps to gitlab runner operator
What does this MR do?
This MR adds some additional troubleshooting information to the GitLab Runner Operator for OpenShift.
Why was this MR needed?
This MR was created as a result of some troubleshooting work the GitLab Runner Operator team ran through with one of our partners while they tried the Operator for the first time.
What's the best way to test this MR?
Review the additional text for technical accuracy and spelling errors.