Mobile does not support negation in targeting expressions

[freshstrangemusic]

jexl-rs does not support negation (see this open PR) and the recently added inclusion/exclusion targeting uses negation.

See-also mozilla-mobile/firefox-ios#15843
See-also https://bugzilla.mozilla.org/show_bug.cgi?id=1846471

┆Issue is synchronized with this Jira Task

[freshstrangemusic]

Fixed in #9204