io_uring/rsrc: remove unused parameter ctx for io_rsrc_node_alloc()

io_uring_ctx parameter for io_rsrc_node_alloc() is unused for now.
This patch removes the parameter and fixes the callers accordingly.

Signed-off-by: Sidong Yang <sidong.yang@furiosa.ai>
Link: https://lore.kernel.org/r/20250115142033.658599-1-sidong.yang@furiosa.ai


Signed-off-by: Jens Axboe <axboe@kernel.dk>