[Bugfix] Trully stream data from iterable #5134
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GuzzleHttp\Psr7\Utils::streamFor
is building a PumpStream for callable resource and requested the resource with and length to building the data as string step by step.Because, lizmap builds a stream with a function without the length parameter, all the content is build as string before sending it to output.
Try to fix it, by providing a function with the length parameter around our iterator.