Copy designs to new issue when issue is moved

What does this MR do?

Adds a new DesignManagement::CopyDesignCollectionService which is called during an issue move. The service copies all designs, versions and notes to the new issue.

The design_management_copy_designs feature flag must be enabled on both the original project and target project of the move (rollout issue: #247062 (closed)).

This MR is branched from !42291 (merged) and has it as an MR dependency.

• Downstream MRs !42432 (merged) !42548 (merged)
• Issue: #13426 (closed)

QA steps:

1. Enable design_management_copy_designs feature: Feature.enable(:design_management_copy_designs)
2. Add designs to an issue (add, update, delete to create many versions)
3. Add comments to designs (resolve some threads)
4. Move the issue
5. Reload until the designs appear (!42548 (merged) will make this experience better)
6. 🎉 (hopefully)

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