[php8-compat] fix Upgrade call back issues by making functions static… #20503
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… and also fixing an issue with an array key not existing when checking obsolete extensions
Overview
This fixes call backs in php8 in the upgrade process by making the functions static and also fixing this notice error
Before
Upgrade Tests fail on php8
After
Upgrade tests work on php8
ping @eileenmcnaughton @totten @demeritcowboy