Merge pull request #21972 from nextcloud/techdebt/noid/cleanup-phpunit-warnings

apps/dav/tests/unit/CalDAV/CalDavBackendTest.php

apps/dav/tests/unit/Command/ListCalendarsTest.php

apps/dav/tests/unit/Command/MoveCalendarTest.php

...federatedfilesharing/tests/FederatedShareProviderTest.php

tests/Core/Command/TwoFactorAuth/CleanupTest.php

tests/Core/Command/TwoFactorAuth/DisableTest.php

tests/Core/Command/TwoFactorAuth/EnableTest.php

tests/Core/Command/TwoFactorAuth/EnforceTest.php

tests/Core/Command/TwoFactorAuth/StateTest.php

tests/lib/AppFramework/Http/DownloadResponseTest.php

tests/lib/ConfigTest.php

tests/lib/DB/DBSchemaTest.php

tests/lib/L10N/FactoryTest.php

tests/lib/Template/CSSResourceLocatorTest.php

tests/lib/Template/JSResourceLocatorTest.php

tests/lib/Template/ResourceLocatorTest.php