phpcs and psalm level 6 fixes

lib/Auth/Source/OAuth2.php

lib/Auth/Source/OpenIDConnect.php

lib/OAuth2ResponseHandler.php

lib/Providers/AdjustableGenericProvider.php

lib/locators/HTTPLocator.php

lib/locators/SourceService.php

lib/locators/SourceServiceLocator.php

psalm.xml

tests/lib/AttributeManipulatorTest.php

tests/lib/Auth/Source/MicrosoftHybridAuthTest.php

tests/lib/Auth/Source/OpenIDConnectTest.php

tests/lib/OAuth2ResponseHandlerTest.php

tests/lib/OIDCLogoutHandlerTest.php

tests/lib/Providers/OpenIDConnectProviderTest.php

tests/lib/RedirectException.php