Update integration tests affected by the changes

Author: fisxoj

spec/graphql/execution/errors_spec.rb

@@ -307,7 +307,7 @@ def non_nullable_array
       it "outputs the appropriate error message when using non-interpreter schema" do
         res = ErrorsTestSchemaWithoutInterpreter.execute("{ nonNullableArray }")
         expected_error = {
-          "message" => "Cannot return null for non-nullable field Query.nonNullableArray",
+          "message" => "Cannot return null for non-nullable element of type 'String!' for Query.nonNullableArray",
           "path" => ["nonNullableArray", 0],
           "locations" => [{ "line" => 1, "column" => 3 }]
         }
@@ -317,7 +317,7 @@ def non_nullable_array
       it "outputs the appropriate error message when using interpreter schema" do
         res = ErrorsTestSchema.execute("{ nonNullableArray }")
         expected_error = {
-          "message" => "Cannot return null for non-nullable field Query.nonNullableArray",
+          "message" => "Cannot return null for non-nullable element of type 'String!' for Query.nonNullableArray",
           "path" => ["nonNullableArray", 0],
           "locations" => [{ "line" => 1, "column" => 3 }]
         }

spec/graphql/execution/interpreter_spec.rb

@@ -511,7 +511,7 @@ def execute_multiplex(multiplex:)
         }
       }
       GRAPHQL
-      assert_equal ["Cannot return null for non-nullable field Query.find"], res["errors"].map { |e| e["message"] }
+      assert_equal ["Cannot return null for non-nullable element of type 'Entity!' for Query.find"], res["errors"].map { |e| e["message"] }
     end
 
     it "works with lists of unions" do