feature #35773 [Notifier] Change notifier recipient handling (jschaedl)

This PR was squashed before being merged into the 5.2-dev branch.

Discussion
----------

[Notifier] Change notifier recipient handling

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #35558 <!-- prefix each issue number with "Fix #", if any -->
| License       | MIT
| Doc PR        | tbd.

According to @wouterj's reasoning in #35558 I did the following to merge the `AdminRecipient` with the `Recipient` class:

- introduced a `EmailRecipientInterface` with `getEmail(): string` methods
- introduced a `RecipientInterface` that is extended by `EmailRecipientInterface` and `SmsRecipientInterface`
- changed `Recipient` class which now holds an email and a phone number property and implements the `EmailRecipientInterface` and the `SmsRecipientInterface`
- changed `NoRecipient` class which now implements the `RecipientInterface`
- removed the `AdminRecipient` and fixed all related type-hints
- introduced an `EmailRecipient` and `SmsRecipient`
- changed the type-hint of the `$recipient` argument in `NotifierInterface::send()`, `Notifier::getChannels()`, `ChannelInterface::notifiy()` and `ChannelInterface::supports()` to `RecipientInterface`
- changed the type hint of the `$recipient` argument in the `as*Message()` of the  `EmailNotificationInterface` and `SmsNotificationInterface` which now uses the introduced interfaces
- changed the type hint of the `$recipient` argument in the static `fromNotification()` factory methods in `EmailMessage` and `SmsMessage` which now uses the introduced interfaces
- changed `EmailChannel` to only support recipients which implement the `EmailRecipientInterface`
- changed `SmsChannel` only supports recipients which implement the `SmsRecipientInterface`

Commits
-------

588607bdd1 [Notifier] Change notifier recipient handling

Author: fabpot

DependencyInjection/FrameworkExtension.php

@@ -107,7 +107,7 @@
 use Symfony\Component\Notifier\Bridge\Twilio\TwilioTransportFactory;
 use Symfony\Component\Notifier\Bridge\Zulip\ZulipTransportFactory;
 use Symfony\Component\Notifier\Notifier;
-use Symfony\Component\Notifier\Recipient\AdminRecipient;
+use Symfony\Component\Notifier\Recipient\Recipient;
 use Symfony\Component\PropertyAccess\PropertyAccessor;
 use Symfony\Component\PropertyInfo\PropertyAccessExtractorInterface;
 use Symfony\Component\PropertyInfo\PropertyDescriptionExtractorInterface;
@@ -2098,7 +2098,7 @@ private function registerNotifierConfiguration(array $config, ContainerBuilder $
             $notifier = $container->getDefinition('notifier');
             foreach ($config['admin_recipients'] as $i => $recipient) {
                 $id = 'notifier.admin_recipient.'.$i;
-                $container->setDefinition($id, new Definition(AdminRecipient::class, [$recipient['email'], $recipient['phone']]));
+                $container->setDefinition($id, new Definition(Recipient::class, [$recipient['email'], $recipient['phone']]));
                 $notifier->addMethodCall('addAdminRecipient', [new Reference($id)]);
             }
         }