Shouldn't be able to join expired Sync chain

[stephendonner]

Description:

Shouldn't be able to join expired Sync chain

This is a followup issue from brave/brave-browser#19550.

Steps to Reproduce

1. Create a Sync chain on Desktop and keep it open until Step 6 is done.
2. Wait 20 minutes / forward system clock on both iOS and Desktop.
3. Attempt to join Sync chain on iOS (it should WORK, and DOES).
4. Reset iOS profile (reinstall).
5. Wait 11 minutes (so that it’s > 30 minutes since generating the code) / forward system clock again on both iOS and Desktop.
6. Attempt to join Sync chain on iOS (it should FAIL, but WORKS).

Actual result:

Able to join the Sync chain from iOS

Expected result:

Should see Code expired or similar

Reproduces how often: [Easily reproduced, Intermittent Issue]
100% (maybe I'm doing this wrong?)

Brave Version:
1.33 (21.12.7.21)

Device details:
iPhone 6s (iOS 15.0.2)

cc @brave/legacy_qa

[stephendonner]

Got this working; did it without forwarding the system clock, and got the following expected dialog: