Replace Emoji Search Base64 Icon with SVG Icon

We currently inline in our CSS a base64 png icon for a magnifying icon, which is an outdated icon and bloats our css.

We should replace the Icon in the Emoji Search with our GitLab SVG Icon and remove the base64 from CSS https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/stylesheets/framework/awards.scss#L64