Resolves#47626.
- [X] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
## Testing
- [X] Added/updated automated tests
- [X] QA'd all new/changed functionality manually
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## Summary by CodeRabbit
- **Bug Fixes**
- Fixed Fleet re-enrollment on Linux for end-user authentication SSO
when the re-enrollment email differs from the original enrollment email.
- Re-enrollment now remaps the device to the correct SSO account, with
no SSO callback/login errors, and does not reuse the prior account UUID.
- **Tests**
- Added a regression test covering re-enrollment with the same device
host UUID but a different IdP user/email, validating email updates and
account UUID change.
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Lucas Manuel Rodriguez
53c0ca8dda