exportUrlsToPortal: stop fusing remote urls
this proofs insanely troublesome. because of the way the filetransfer portal works we need to open() paths before sending them to the portal, this however means open() on our fuse-redirected paths which behind the scenes is actually a remote stat() to determine the file type. this is insanely expensive and just will not ever work for more than a couple of files.
for the time being we'll disable fuse redirection unless explicitly opted into via KCOREADDONS_FUSE_REDIRECT so it can still be tested.