Recovery for users impacted by enabling the credential extension before app migration on app version 7.149.0

[amddg44]

Task/Issue URL: https://app.asana.com/0/414235014887631/1209005320461774/f
Tech Design URL:
CC:

Description:
Recovers the passwords vault of any users impacted by edge case scenario of enabling the credential provider extension before the app has perform the migration

Steps to test this PR:

1. Starting with your existing app build on device which has some passwords saved, run up the app from the branch and confirm all your passwords are all present
2. Turn DDG off as a system credential provider
3. Now we are going to reset your state for testing upgrading from an old app version
4. Download this adhoc build that will allow you to reset in order to downgrade properly
5. Go to the Debug screen > Keychain Items and tap the button at the top right to remove all v4 migrated data
6. Downgrade to an older version of the app via TestFlight
7. Save some passwords for e.g autofill.me
8. Now upgrade to the problematic app version 7.149.0 (3) from TestFlight but do NOT launch the app
9. Enable the app as a system credential provider and tap through to view your passwords and confirm they have vanished
10. Run up this branch again and confirm your passwords are now back!

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Definition of Done (Internal Only):

• Does this PR satisfy our Definition of Done?

Copy Testing:

• Use of correct apostrophes in new copy, ie ’ rather than ’

Orientation Testing:

• Portrait
• Landscape

Device Testing:

• iPhone SE (1st Gen)
• iPhone 8
• iPhone X
• iPhone 14 Pro
• iPad

OS Testing:

• iOS 15
• iOS 16
• iOS 17

Theme Testing:

• Light theme
• Dark theme

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Internal references:

Software Engineering Expectations
Technical Design Template

[aataraxiaa]

Nice one @amddg44, tested and recovery works 👍🏼 Approved on the understanding that tests will be added.