Show error when API Fuzzing feature not available

What does this MR do?

Show and error in the pipeline when not licensed to use API Fuzzing. API Fuzzing is only available to Gold/Ultimate users.

• This template change is backwards compatible for all users.
• No documentation changes are needed

Screenshots (strongly suggested)

Pipeline without Ultimate/Gold

Pipeline with Ultimate/Gold

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Related to #270412 (closed)