I18N: Set translations for all WordPress packages scripts.

Calls `wp_set_script_translations` for all packages scripts that have translations. Also correctly sets the domain on the translations.

Props omarreiss, pento, ocean90.
Merges [43878] to trunk.
Fixes #45161.
Built from https://develop.svn.wordpress.org/trunk@44239


git-svn-id: https://core.svn.wordpress.org/trunk@44069 1a063a9b-81f0-0310-95a4-ce76da25c4cd