Pascal Birchler b713c5eb9c Upgrade/Install: Fix JavaScript localization on install page.
Blocks registration causes scripts to be initialized and localized very early, before the current locale has been properly set on the installation page.

This changes `determine_locale()` so that the locale chosen during installation is recognized and loaded earlier, ensuring proper script localization.

Props sabernhardt, NekoJonez, jornp, costdev.
Fixes #58696
Built from https://develop.svn.wordpress.org/trunk@57286


git-svn-id: http://core.svn.wordpress.org/trunk@56792 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2024-01-15 18:57:14 +00:00
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