fixed copy to cliboard button in embedded snippets

What does this MR do?

fixing copy to clipboard button in embedded snippets.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Copy to clipboard button was giving error message due to mismatch in class name. Making it useless.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

fix #46303 (closed)