Broken streaming endpoint due to ViewComponent gem update

During investigation, @slashmanov found out that the recent update of view_component gem broke streaming endpoints.

Streaming endpoint is raising an error of Missing rack.input after streaming few files (sometimes after a single file).

We need to investigate why and devise a fix/workaround. We're looking at https://github.com/ViewComponent/view_component/pull/2079 as possible cause but it can be not the root cause.