Add typed create user events

apps/user_ldap/tests/LDAPProviderTest.php

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

lib/private/Server.php

lib/private/User/Manager.php

lib/public/User/Events/CreateUserEvent.php

lib/public/User/Events/UserCreatedEvent.php

tests/lib/Files/Config/UserMountCacheTest.php

tests/lib/Files/Storage/Wrapper/EncryptionTest.php

tests/lib/Files/Stream/EncryptionTest.php

tests/lib/User/ManagerTest.php

tests/lib/User/SessionTest.php