feature #32916 [Mailer] Add a name to the transports (fabpot)

This PR was merged into the 4.4 branch.

Discussion
----------

[Mailer] Add a name to the transports

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Having a name for Transports helps identify them (useful for instance in the profiler when one uses several mailers).

Commits
-------

2412dfe71f [Mailer] added a name to the transport

Author: fabpot

Tests/Functional/MailerTest.php

@@ -42,6 +42,11 @@ public function __construct(EventDispatcherInterface $eventDispatcher, LoggerInt
                 $this->onDoSend = $onDoSend;
             }
 
+            public function getName(): string
+            {
+                return 'dummy://local';
+            }
+
             protected function doSend(SentMessage $message): void
             {
                 $onDoSend = $this->onDoSend;

composer.json

@@ -74,6 +74,7 @@
         "symfony/dom-crawler": "<4.3",
         "symfony/form": "<4.3",
         "symfony/lock": "<4.4",
+        "symfony/mailer": "<4.4",
         "symfony/messenger": "<4.3",
         "symfony/property-info": "<3.4",
         "symfony/serializer": "<4.2",