fix: replays, screenshots and scripted iOS launches keep away from the account's settings and iCloud

A replay or --screenshot run without --settings starts from no settings, and reaches
iCloud only through SNOWBOUND_ICLOUD_FOLDER; iOS launched with a SNOWBOUND_ variable
reaches it only through SNOWBOUND_ICLOUD. The replay tests run in a home folder of
their own.

Assisted-by: claude-opus-5.5
d082587137clover caruso committed on 10/2/2026, 11:22:25 PMparentf3b369e
5 files changedLine totals unavailable