## Context
SyncExternalId should be renamed because this won't always represent an
id. For example, microsoft API does not use ids but dates for their
sync. Also we think external is a bit redundant so we are removing it.
Note: this field is not used by the front-end (and will probably never
be)
- If sync fails we set authFailedAt
- This information is displayed in the frontend in accounts with a `Sync
Failed` pill
- The user can reconnect his account in the dropdown menu
- A new OAuth flow is triggered
- The account is synced
* update calendarEvent labels and description to match Figma
* modify conferenceUri to conferenceLink with LINK type
* update format-google-calendar-event.util to match new conferenceLink
* update CalendarEventDetails since overriding the fields is no longer needed
* fix mock metadata
* generate new uuid for field conferenceLink
