Multipart request body too large does not set error Status Code

[Tadimsky]

What happened?

If you upload a file that is too large via the Multipart transport, it returns an error to the client but does not set a non-200 error code.

What did you expect?

I would expect to write a http.StatusRequestEntityTooLarge as the status.
This is the only error in the codebase I could find where we don't specifically set a status:

gqlgen/graphql/handler/transport/http_form_multipart.go

Lines 64 to 66 in d14fd79

	if r.ContentLength > f.maxUploadSize() {
	writeJsonError(w, "failed to parse multipart form, request body too large")
	return