* Skip IntrinsicAttributes elaboration in JSX errors
Do not issue an error message for a source type that comes from JSX
attributes and a target type that is an intersection containing
IntrinsicAttributes or IntrinsicClassAttributes. This will make error
messages simpler and less confusing.
Note:
1. There will always be elaboration under the skipped message, so this
won't elide errors completely.
2. Rarely (once in the tests) the intersection type will have more that
one non-Intrinsic* member. However, these additional members don't
provide useful information either, so it's fine to skip them.
* Add test of IntrinsicAttributes error
* Fix indentation in test
