feature #50705 [Mailer][Webhook] Add Sendgrid webhook support (WoutervanderLoopNL)

This PR was merged into the 6.4 branch.

Discussion
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[Mailer][Webhook] Add Sendgrid webhook support

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | Fix #50704
| License       | MIT

Support webhooks from [SendGrid](https://docs.sendgrid.com/for-developers/tracking-events/getting-started-event-webhook)

Commits
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bb57ad0528 [Webhook][RemoteEvent] Add Sendgrid symfony#50704

Author: fabpot

DependencyInjection/FrameworkExtension.php

@@ -2677,6 +2677,7 @@ private function registerMailerConfiguration(array $config, ContainerBuilder $co
             $webhookRequestParsers = [
                 MailerBridge\Mailgun\Webhook\MailgunRequestParser::class => 'mailer.webhook.request_parser.mailgun',
                 MailerBridge\Postmark\Webhook\PostmarkRequestParser::class => 'mailer.webhook.request_parser.postmark',
+                MailerBridge\Sendgrid\Webhook\SendgridRequestParser::class => 'mailer.webhook.request_parser.sendgrid',
             ];
 
             foreach ($webhookRequestParsers as $class => $service) {

Resources/config/mailer_webhook.php

@@ -15,6 +15,8 @@
 use Symfony\Component\Mailer\Bridge\Mailgun\Webhook\MailgunRequestParser;
 use Symfony\Component\Mailer\Bridge\Postmark\RemoteEvent\PostmarkPayloadConverter;
 use Symfony\Component\Mailer\Bridge\Postmark\Webhook\PostmarkRequestParser;
+use Symfony\Component\Mailer\Bridge\Sendgrid\RemoteEvent\SendgridPayloadConverter;
+use Symfony\Component\Mailer\Bridge\Sendgrid\Webhook\SendgridRequestParser;
 
 return static function (ContainerConfigurator $container) {
     $container->services()
@@ -27,5 +29,10 @@
         ->set('mailer.webhook.request_parser.postmark', PostmarkRequestParser::class)
             ->args([service('mailer.payload_converter.postmark')])
         ->alias(PostmarkRequestParser::class, 'mailer.webhook.request_parser.postmark')
+
+        ->set('mailer.payload_converter.sendgrid', SendgridPayloadConverter::class)
+        ->set('mailer.webhook.request_parser.sendgrid', SendgridRequestParser::class)
+            ->args([service('mailer.payload_converter.sendgrid')])
+        ->alias(SendgridRequestParser::class, 'mailer.webhook.request_parser.sendgrid')
     ;
 };