fix i18n: separate Publish action and Published status

[stephane-gillot]

Note

Low Risk
String and translation-catalog changes only; no logic or security impact.

Overview
Fixes a gettext collision where the post list Publish action and the sync default status option both used the same Publish string, which broke French (and similar) locales that need Publier vs Publié.

The row action in admin-restrictions.php now uses _x( 'Publish', 'verb', ... ). The default-status dropdown in server-page-add.php uses a distinct string Published. The POT and fr_FR catalog were updated so each message has its own entry and translation.

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