Add troubleshooting for Jira credentials and permission issues

What does this MR do?

As per https://gitlab.slack.com/archives/C04RDL3MEH5/p1695906232942449

Adds a new troubleshooting section for The credentials for accessing Jira are not allowed to access the data.

Also adds some ways that we can validate the Jira user returns the issues we expect.

Related issues

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