Draft: Resolve "Add 'Issue Reference' + 'Copy reference to clipboard' to sidebar on boards"

What does this MR do?

Adds a 'Copy Reference' section to the sidebar displayed when clicking on an issue from a board.

Screenshots

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

Closes #36623