fix: check var type instead of declaring class to support PDOStatement subclasses

Author: Etienne V. Labelle

src/Rules/PdoStatementExecuteMethodRule.php

@@ -43,7 +43,7 @@ public function processNode(Node $methodCall, Scope $scope): array
             return [];
         }
 
-        if (PDOStatement::class !== $methodReflection->getDeclaringClass()->getName()) {
+        if (!(new \PHPStan\Type\ObjectType(PDOStatement::class))->isSuperTypeOf($scope->getType($methodCall->var))->yes()) {
             return [];
         }