net: remove the netif_get_rx_queue_lease_locked() helpers

net: remove the netif_get_rx_queue_lease_locked() helpers

The netif_get_rx_queue_lease_locked() API hides the locking
and the descend onto the leased queue. Making the code
harder to follow (at least to me). Remove the API and open
code the descend a bit. Most of the code now looks like:

 if (!leased)
     return __helper(x);

 hw_rxq = ..
 netdev_lock(hw_rxq->dev);
 ret = __helper(x);
 netdev_unlock(hw_rxq->dev);

 return ret;

Of course if we have more code paths that need the wrapping
we may need to revisit. For now, IMHO, having to know what
netif_get_rx_queue_lease_locked() does is not worth the 20LoC
it saves.

Link: https://patch.msgid.link/20260408151251.72bd2482@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>