fix: fix URLSessionInstrumentation for a missing case #982
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This fixes a particular way of using
NSURLSessionthat the instrumentation was missing, where a session delegate implements onlyfunc urlSession(_:task:didFinishCollecting:). This was caught by some Honeycomb end-to-end tests that exercise URLSession in various ways. I suspect that this was missed because this method is in the super-protocolNSURLSessionTaskDelegate, rather than theNSURLSessionDataDelegateprotocol.I have verified that our own end-to-end tests fail before this change and pass after.
I've added a regression test to make sure this stays working.