Fix DataResponse typehints
Fix DataResponse typehints

We use this already in several places where we just pass strings or
numbers.
This all works because we just convert it to a json response in the end.
So better to have the typehints reflect this.

Signed-off-by: Roeland Jago Douma <982d370f7dc34a05b4abe8788f899578d515262d@famdouma.nl>

nextcloud/server,nextcloud/server,nextcloud/server,nextcloud/server