onedrive: fall back to manual drive ID entry when drive listing fails

When both /me/drives and /me/drive fail during config (for example an
account-level 403 serviceReadOnly "Database Is Read Only"), send the
config state machine to the existing manual drive ID entry state
instead of dead-ending at choose_type with the raw error. The drive
itself remains usable when only the enumeration API is blocked.

Fixes #9794
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f