R1:918f4ebcd82c

Fix a double-prompt for MFA when recovering a password account

Summary:
Depends on D19905. Ref T13222. In D19843, I refactored this stuff but `$jump_into_hisec` was dropped.

This is a hint to keep the upgraded session in hisec mode, which we need to do a password reset when using a recovery link. Without it, we double prompt you for MFA: first to upgrade to a full session, then to change your password.

Pass this into the engine properly to avoid the double-prompt.

Test Plan:
- Used `bin/auth recover`…