Update settings to toggle auto-detect schema changes notifications

[edmundito]

Update the connections settings page to enable/disable notification for auto-detect schema changes.

Design:
https://www.figma.com/file/liLQhcbpVHiEDW18kiXQe3/01_03_CONNECTIONS?node-id=2062%3A60213&t=EAjh7xtF8vK5jde6-1

Backend changes:
API: #18636
Impl: #18735

[octavia-squidington-iv]

cc @airbytehq/frontend

[jdpgrailsdev]

@andyjih We need updated UX design for notification preferences for auto-detect schema changes.