Revert "Issue #2917655 by xjm, Spokje, catch, Gábor Hojtsy, Pasqualle, rivimey, effulgentsia, andypost, heddn, daffie, Aki Tendo, Berdir, mpdonadio, quietone, mondrake, Wim Leers, plach, DamienMcKenna, Chi, mfb: [9.4.x only] Drop official PHP 7.3 support in Drupal 9.4" This reverts commit f25db89b.