Show dashboard notification for unconfirmed emails and untrusted secondary emails (#23919)

* Show an aggressive dashboard notification for unconfirmed emails
Show a persistent dashboard notification for untrusted secondary emails

* For emails before the cutoffDate, start displaying the notification on the deletionDate and show the notification for 90 days

* Update the email deletion logic for displaying the email notification and update test

* Update test

GitOrigin-RevId: 1b0e44f79592292d428c634dc1ec4df9e6ceaeb4

services/web/types/user-email.ts

@@ -3,6 +3,7 @@ import { Affiliation } from './affiliation'
 export type UserEmailData = {
   affiliation?: Affiliation
   confirmedAt?: string
+  lastConfirmedAt?: string | null
   email: string
   default: boolean
   samlProviderId?: string