Don't use DnD by default for API Fuzzing

What does this MR do?

Update to API Fuzzing CI template to prevent DnD usage unless configured by user.

• This template is backwards compatible with existing users with documented features.
• Undocumented features still work with a job name suffix of _dnd

Working pipeline with new template:

• https://gitlab.com/mikeeddington/api-fuzzing-test/-/jobs/809553804
• DnD https://gitlab.com/mikeeddington/api-fuzzing-test/-/jobs/809554248

Addresses #241736 (closed)

Screenshots (strongly suggested)

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