Migrate InfoBox components to the new Alert component

[gtsiolis]

Problem to solve

Following up from #9411, this issue acts as a placeholder for migrating the InfoBox components which could be a bit more tricky, and could require some discussion upfront, given how it's been used in some cases, see #8701.

Proposal

Migrate InfoBox (8 component instances) to the new Alert component. ➿

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.