feat: update Murena account to use OAuth on SSO migration

Description

When Murena account is migrated from password-based to SSO in /e/OS Account Manager, Mail needs to update its auth state and auth type to match with OAuth after the migration is complete.

Screenshots

Technical details

Tests

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/3485

Corresponding Account Manager MR: AccountManager!162 (merged)

10 commandments of code review

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Summary by CodeRabbit

• Bug Fixes
  • Improved synchronization of OAuth authentication state for Murena email accounts, ensuring account information stays up to date.