Account for non-final classes: child can override property visibility

For non-final classes, a child class can widen visibility:
- protected: type is preserved (invariant in PHP), treat as maybe
- private: child can redeclare with any type, treat as mixed

For final classes, non-accessible properties return empty array.

Add implicit final test for new expression (asFinal via NewHandler).

Author: janedbal

tests/PHPStan/Analyser/nsrt/array-column-php82.php

@@ -301,6 +301,19 @@ public function testNonPublicAsIndex(array $objects): void
 
 }
 
+class ArrayColumnVisibilityImplicitFinalTest
+{
+
+	public function testNewExpression(): void
+	{
+		$objects = [new NonFinalObjectWithVisibility()];
+		assertType('array{int}', array_column($objects, 'pub'));
+		assertType('array{}', array_column($objects, 'prot'));
+		assertType('array{}', array_column($objects, 'priv'));
+	}
+
+}
+
 class ArrayColumnVisibilityFromInsideTest
 {