Do not call JIRA API if project_key is not set

What does this MR do?

Calling JIRA API with blank project_key causes TypeError: no implicit conversion of Array into Hash in jira-ruby gem. We have old records in the database that do not have project_key set and we have to handle them.

Does this MR meet the acceptance criteria?

• Changelog entry added
• [ ] Documentation created/updated
• [ ] API support added
• Tests
  • [ ] Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #24777 (closed)