Fix gl-icon in ee/app/assets/javascripts/users/identity_verification/components/credit_card_verification.vue

from !173401 (comment 2226258597)

The gl-icon on line 120 seems like it is for displaying information and should use a info variant. for more information look at the gl-icon storybook entry: https://gitlab-org.gitlab.io/gitlab-ui/?path=/docs/base-icon--docs

In addition to this, size 14 is unexpected as the only sizes we have icons for are 12px and 16px

Implementation Guide: change variant to "info" and change size to either 12px or 16px. make sure to add screenshots to MR