io_uring: fix read memory leak

Don't forget to free iovec read inline completion and bunch of other
cases that do "goto done" before setting up an async context.

Fixes: 5ea5dd45 ("io_uring: inline io_read()'s iovec freeing")
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>