Issue #3531324 by simonbaese, anna d: Emails processed in queue are not translated

.gitlab-ci.yml

src/Plugin/EmailAdjuster/QueueSendingEmailAdjuster.php

src/Plugin/QueueWorker/SymfonyMailerQueueWorker.php

src/QueueableEmail.php

src/StaticLanguageNegotiator.php

src/StaticLanguageNegotiatorInterface.php

src/SymfonyMailerQueueItem.php

src/SymfonyMailerQueueServiceProvider.php

...mailer.mailer_policy.symfony_mailer_queue.translation.yml

...mailer.mailer_policy.symfony_mailer_queue.translation.yml

...e_test/config/schema/symfony_mailer_queue_test.schema.yml

.../Plugin/EmailAdjuster/SubjectTranslationEmailAdjuster.php

...ue_test/src/Plugin/EmailBuilder/QueueTestEmailBuilder.php

tests/src/Kernel/SymfonyMailerQueueTranslationTest.php

tests/src/Traits/TranslationTestTrait.php