Change translation strings of grouped notification label to have full context (#31486)

...n/features/notifications_v2/components/displayed_name.tsx

...otifications_v2/components/notification_admin_sign_up.tsx

...es/notifications_v2/components/notification_favourite.tsx

...tures/notifications_v2/components/notification_follow.tsx

...tifications_v2/components/notification_follow_request.tsx

...ications_v2/components/notification_group_with_status.tsx

...tures/notifications_v2/components/notification_reblog.tsx

...tures/notifications_v2/components/notification_status.tsx

...tures/notifications_v2/components/notification_update.tsx

.../notifications_v2/components/notification_with_status.tsx

app/javascript/mastodon/locales/en.json