refactor(phpstan): Fix PHPStan reports for level 2 (#3104477)

...fer/Drupal/Sniffs/Semantics/FunctionTriggerErrorSniff.php

coder_sniffer/Drupal/Sniffs/Semantics/RemoteAddressSniff.php

coder_sniffer/Drupal/Test/Arrays/ArrayUnitTest.php

coder_sniffer/Drupal/Test/Classes/ClassFileNameUnitTest.php

...r/Drupal/Test/Classes/FullyQualifiedNamespaceUnitTest.php

coder_sniffer/Drupal/Test/Commenting/FileCommentUnitTest.php

...niffer/Drupal/Test/Commenting/FunctionCommentUnitTest.php

...r/Drupal/Test/Commenting/PostStatementCommentUnitTest.php

...iffer/DrupalPractice/Sniffs/Commenting/AuthorTagSniff.php

...sniffer/DrupalPractice/Sniffs/Yaml/RoutingAccessSniff.php

...lPractice/Test/InfoFiles/NamespacedDependencyUnitTest.php

.../DrupalPractice/Test/ProjectDetection/ProjectUnitTest.php

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