Remove prefixes from transition CSS property

What does this MR do?

Removes vendor prefixes from the CSS transition property

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

None

Why was this MR needed?

Reduces unnecessary CSS

Screenshots (if relevant)

None

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • All builds are passing
• 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 #21614 (closed)