fuse: clear FR_PENDING if abort is detected when sending request

The (!fiq->connected) check was moved into the queuing method resulting in
the following:

Fixes: 5de8acb4 ("fuse: cleanup request queuing towards virtiofs")
Reported-by: Lai, Yi <yi1.lai@linux.intel.com>
Closes: https://lore.kernel.org/all/ZvFEAM6JfrBKsOU0@ly-workstation/


Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>