What are the relevant tickets?

Closes https://github.com/mitodl/hq/issues/6325

Description (What does it do?)

This PR removes an unnecessary wrapper around an icon. Previously the wrapping div had an aria-label; this is technically disalllowed and causes some accessibility checkers to issue a warning.

Now the aria-label is on an svg, which is 👍 .

Screenshots

Small cards with a certificate are "affected", but there is no visual change:

How can this be tested?

1. View a small card with a certificate on RC. These can be found (possibly) in your dashboard, or in the "Similar Resources" carousels inside the learning resource drawer. Check the certificate icon dimensions:
   • svg is 12px by 12px
   • so is the div wrapping it
2. Do same locally; svg should still be 12px by 12px. The div wrapping it is gone. The SVG itself now has aria-label.
3. Additionally / Optionally, you could check that an accessibility checker like axe devtools no longer flags the aria-label as invalid. (Run it with the drawer open).