Add isAcceptedBy test for array&hasOffsetValue with union accepting type

Tests that array<mixed>&hasOffsetValue(3, int) is accepted by
array<int>|array<string> — the isSuperTypeOf guard correctly allows
this since array<int> individually accepts the intersection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: phpstan-bot

tests/PHPStan/Type/IntersectionTypeTest.php

@@ -209,7 +209,7 @@ public static function dataIsAcceptedBy(): Iterator
 			TrinaryLogic::createNo(),
 		];
 
-		// array&hasOffsetValue(3, int) isAcceptedBy array<int>|array<string>
+		// array&hasOffsetValue(3, int) isAcceptedBy array<int>|array<string> - yes (array<int> accepts it)
 		yield [
 			new IntersectionType([
 				new ArrayType(new MixedType(), new MixedType()),