migrate tests for top level await from chakra core

Hi, Chakracore has a couple of tests that may be worth porting to test262: https://github.com/chakra-core/ChakraCore/blob/a28fef108f40edc3bf9a9eda275f111cd08dd4b6/test/es6module/top-level-await.js#L71-L202

Discussion originally here: https://github.com/tc39/proposal-top-level-await/issues/137