Issue #3230024 by phenaproxima, tedbow: Collect exclusions from event objects

automatic_updates.services.yml

src/Event/ExcludedPathsSubscriber.php

src/Event/ExcludedPathsTrait.php

src/Event/PreCommitEvent.php

src/Event/PreStartEvent.php

src/Form/UpdateFormBase.php

src/Form/UpdateReady.php

src/Form/UpdaterForm.php

src/Updater.php

...omatic_updates_test/src/ReadinessChecker/TestChecker1.php

tests/modules/automatic_updates_test/src/TestUpdater.php

...es/composer_stager_bypass/composer_stager_bypass.info.yml

...omposer_stager_bypass/composer_stager_bypass.services.yml

tests/modules/composer_stager_bypass/src/Beginner.php

tests/modules/composer_stager_bypass/src/Committer.php

...stager_bypass/src/ComposerStagerBypassServiceProvider.php

tests/modules/composer_stager_bypass/src/Stager.php

tests/src/Functional/ExclusionsTest.php

tests/src/Functional/UpdaterFormTest.php