* MM-22057: Limit incoming request bodies
Set the max request body size to be equal to MaxFileSize.
Ideally, non-file request bodies should be smaller than file request bodies,
but we don't have a clean way to identify all file upload handlers.
There shouldn't be any valid request which exceeds the max file upload size.
So this is a safe global limit to apply.
* Fix tests
Co-authored-by: mattermod <mattermod@users.noreply.github.com>