Fix snippets pagination

What does this MR do?

If fixes the snippets pagination which was AJAXified recently. /cc @smcgivern

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

Not sure if we could do better?

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #22500 (closed)