Follow up from #22882 and further fallout from #19988
The old OC code cannot cope with "-3" SPACE_UNLIMITED value returned by OC 9.0's Webdav and believes that there is no space left on the remote fed share.
Workaround would be either to make it understand that value (several locations), or simply make the DAV storage return SPACE_UNKNOWN instead.
Upload fails with "Not enough space"
In this case it affects both Webdav upload and web UI upload.
OC 9.0 is not affected because of #23546
Fix is here #23548