Fixed validation of list-type variable default values (#8526)

Author: glen-84

src/HotChocolate/Core/src/Validation/Rules/ValueVisitor.cs

@@ -103,7 +103,7 @@ protected override ISyntaxVisitorAction Enter(
             node.Type.NamedType().Name.Value,
             out var variableType))
         {
-            context.Types.Push(variableType);
+            context.Types.Push(node.Type.RewriteToType(variableType));
             return base.Enter(node, context);
         }
 

src/HotChocolate/Core/test/Validation.Tests/ValuesOfCorrectTypeRuleTests.cs

@@ -1174,6 +1174,7 @@ query WithDefaultValues(
                 $b: String = "ok",
                 $c: Complex3Input = { requiredField: true, intField: 3 }
                 $d: Int! = 123
+                $e: [String!]! = ["default"]
             ) {
                 dog { name }
             }

src/HotChocolate/Core/test/Validation.Tests/__snapshots__/ValuesOfCorrectTypeRuleTests.BadVariablesListWithInvalidItem.snap

@@ -12,7 +12,7 @@
     "Extensions": {
       "variable": "a",
       "variableType": "[String]",
-      "locationType": "String",
+      "locationType": "[String]",
       "specifiedBy": "https://spec.graphql.org/October2021/#sec-Values-of-Correct-Type"
     },
     "Exception": null