Move Address afterValidation logic to defineRules

[nfourtythree]

Description

The move of the logic would allow a developer to hook into the "automatically" added validation and tweak or remove the rules.

With this change a dev could do the following:

Event::on(Address::class, Address::EVENT_DEFINE_RULES, static function($event) {
    foreach ($event->rules as $key => $rule) {
        if (in_array($rule[0], [
            'countryCode',
            'administrativeArea',
            'locality',
            'dependentLocality',
            'postalCode',
            'sortingCode',
            'addressLine1',
            'addressLine2',
        ]) && $rule[1] === 'required') {
            unset($event->rules[$key]);
        }
    }
});