This commit adds a realm-level setting named
'zulip_update_announcements_stream' that configures the
stream to which zulip updates should be posted.
Fixes part of #28604.
This commit renames the realm-level setting
'signup_notifications_stream' to 'signup_announcements_stream'.
The new name reflects better what the setting does.
This commit renames the realm-level setting 'notifications_stream'
to 'new_stream_announcements_stream'.
The new name reflects better what the setting does.
This test has been flaking for a couple months, and it hasn't felt
worth it for anyone to debug, so we should disable or delete it.
I chose deletion, since I don't think this settings panel is a
high-value place for end-to-end testing.