Fix infinite loop bug in Test Mocks (apollographql/apollo-ios-dev#842)

Author: AnthonyMDev

Sources/ApolloTestSupport/TestMock.swift

@@ -198,6 +198,9 @@ fileprivate extension Array {
     case let innerArray as Array<Any>:
       return innerArray._unsafelyConvertToSelectionSetData() as JSONValue
 
+    case let element as JSONValue:
+      return element
+
     case let optionalElement as Optional<any Sendable>:
       guard case let .some(element) = optionalElement.asNullable else {
         return nil