fstests: remove unnecessary stdout/stderr redirection for run_check calls

fstests: remove unnecessary stdout/stderr redirection for run_check calls

It's pointless, and confusing, to have calls to run_check redirect the
stdout and/or stderr, because run_check already redirects it:

   $ cat common/rc
   (...)
   run_check()
   {
       echo "# $@" >> $seqres.full 2>&1
       "$@" >> $seqres.full 2>&1 || _fail "failed: '$@'"
   }
   (...)

So remove those redirections.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>