Fix integration tests

tests/PHPStan/Generics/data/bug2620-3.json

@@ -1,7 +1,7 @@
 [
     {
         "message": "Return type (Traversable<int, Generics\\Bug2620\\Bar>) of method Generics\\Bug2620\\SomeIterator::getIterator() should be compatible with return type (Traversable<int, Generics\\Bug2620\\Foo>) of method IteratorAggregate<int,Generics\\Bug2620\\Foo>::getIterator()",
-        "line": 17,
+        "line": 18,
         "ignorable": true
     }
-]
+]

tests/PHPStan/Generics/data/bug2620.php

@@ -14,6 +14,7 @@ class SomeIterator implements \IteratorAggregate {
     /**
      * @return \Traversable<int, Bar>
      */
+	#[\ReturnTypeWillChange]
     public function getIterator() {
          yield new Bar;
     }

tests/PHPStan/Generics/data/bug2622.php

@@ -14,6 +14,7 @@ public function __construct() {
 		$this->values = [];
 	}
 
+	#[\ReturnTypeWillChange]
 	public function getIterator() {
 		return new \ArrayObject($this->values);
 	}