Ensure links generated by the copy link feature contain variables

What does this MR do?

This ensures that all of the links generated by the Copy Link to Chart and used in embedded metrics utilize the custom variables feature that are stored in the URL

#214531 (closed)

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