[AB Test] Wrong logged out ABTest variation upon logout

[selanthiraiyan]

When the user logs out from the settings screen, we don't get the correct variation for the logged-out experiment.

Reported here - #8744 (review)

This could be the reason for the crossovers for logged-out AB Tests. (In Abacus results)

Internal slack - p1675052166924979/1675051677.773629-slack-C046HDZL87J