Add a way to identify tests that crashed

[lawrence-forooghian]

I'm interested in finding out which tests crashed. In JUnit test report language, these are "errors". However, trainer (which generates our iOS test reports) doesn't currently know how to interpret crashes. So it would be good to have some other way of finding them. Perhaps a simple addition to the filters, allowing us to search by test case failure message (for strings like exception or crash).

┆Issue is synchronized with this Jira Uncategorised by Unito

[lawrence-forooghian]

I've added a failure message filter: https://test-observability.herokuapp.com/uploads?createdAfter=&failureMessage=crash

But it doesn't show much in the way of useful information about the crash - I reckon this is hidden in the test logs / .xcresult bundle, which we don't have in the case of tests that run in a loop.