Enabled monaco_ci by default

What does this MR do?

In the course of rolling out the :monco_ci feature flag, this MR enables the flag by default in the codebase to make it enabled for the self-hosted instances with the next release.

Screenshots

Nothing changed visually

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

References #198612 (closed)