Issue #3255011 by phenaproxima: Don't stage git directories

...e_manager/src/EventSubscriber/ExcludedPathsSubscriber.php

package_manager/tests/fixtures/fake_site/composer.json

package_manager/tests/fixtures/fake_site/private/ignore.txt

...nager/tests/fixtures/fake_site/sites/default/services.yml

...tests/fixtures/fake_site/sites/default/settings.local.php

...nager/tests/fixtures/fake_site/sites/default/settings.php

..._manager/tests/fixtures/fake_site/sites/default/stage.txt

...ager/tests/fixtures/fake_site/sites/example.com/db.sqlite

.../tests/fixtures/fake_site/sites/example.com/db.sqlite-shm

.../tests/fixtures/fake_site/sites/example.com/db.sqlite-wal

...sts/fixtures/fake_site/sites/example.com/files/ignore.txt

...r/tests/fixtures/fake_site/sites/example.com/services.yml

...s/fixtures/fake_site/sites/example.com/settings.local.php

...r/tests/fixtures/fake_site/sites/example.com/settings.php

...ager/tests/fixtures/fake_site/sites/simpletest/ignore.txt

package_manager/tests/fixtures/fake_site/vendor/.htaccess

package_manager/tests/fixtures/fake_site/vendor/web.config

...anager/tests/src/Kernel/ComposerSettingsValidatorTest.php

package_manager/tests/src/Kernel/DiskSpaceValidatorTest.php

..._manager/tests/src/Kernel/ExcludedPathsSubscriberTest.php