[HttpClient] make response stream functionality consistent #35573
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There are three ways of creating a stream from a response:
$response->toStream()
(if the response supports this)StreamWrapper::createResource($response)
StreamWrapper::createResource($response, $httpClient)
(note the second argument)Currently, the 3rd method creates a stream that is not rewindable (the other two are). The first commit adds tests showing the inconsistencies (1 test fails). The second commit is a fix to make the 3 ways consistent.
See https://twitter.com/nicolasgrekas/status/1224047079422599168 for reference.