fix: home page update su

[QRuhier]

On the home page, we check for every survey unit if it needs to be updated in IDB adding new state (the only current case is when we need to add the VIC state).

In the same time, when we persist in IDB, now we consider the survey unit as updated, in order to put it in the next synchronization.

But there was an issue, returning a copy of current states even if there is no new state to add.
Then, when comparing current states with the copy, it considered the lists were different, so even there we did persist surveyUnit with hasBeenUpdated:true

[QRuhier]

Would have been great to add tests on HomePage checking we persist only when needed, but i didn't have time for fighting with the mocks inside the hook 💀

But i improved tests globally to ensure it's ok

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
51.1% Coverage on New Code
0.4% Duplication on New Code

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