net/mlx5: Generalize max_rate and min_rate setting for nodes

Refactor max_rate and min_rate setting functions to operate on
mlx5_esw_sched_node, allowing for generalized handling of both vports
and nodes.

Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241107194357.683732-4-tariqt@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>