Alert guidance: Move successful change feedback out of alert (to toast)

Description

The existing Pajamas alert guidelines says

• Reaffirm to the user that a prior action, likely in a different location or context, has been successful.

but this type of content should be moved to a toast notification instead.

Related

• Toast guidance: Successful change feedback moved from alert
• Instant feedback guidance: Clarify that a toast notification should be used as part of Instant Feedback