Issue #3421400 by adamps, tomsaw: Change to the phases

src/BaseEmailInterface.php

src/BaseEmailTrait.php

src/Email.php

src/EmailInterface.php

src/LegacyMailerHelper.php

src/Plugin/EmailAdjuster/HooksEmailAdjuster.php

src/Plugin/EmailAdjuster/ThemeEmailAdjuster.php

src/Plugin/EmailAdjuster/ToEmailAdjuster.php

src/Plugin/EmailBuilder/CommerceOrderEmailBuilder.php

src/Plugin/EmailBuilder/ContactEmailBuilder.php

src/Plugin/EmailBuilder/ContactEmailBuilderBase.php

src/Plugin/EmailBuilder/LegacyEmailBuilder.php

src/Plugin/EmailBuilder/SimplenewsEmailBuilderBase.php

src/Plugin/EmailBuilder/TestEmailBuilder.php

src/Plugin/EmailBuilder/UpdateEmailBuilder.php

src/Plugin/EmailBuilder/UserEmailBuilder.php

src/Processor/EmailProcessorTrait.php

symfony_mailer.api.php

tests/src/Kernel/EmailInterfaceTest.php