net/mlx5: Integrate esw_qos_vport_enable logic into rate operations

Fold the esw_qos_vport_enable function into operations for configuring
maximum and minimum rates, simplifying QoS logic. This change
consolidates enabling and updating the scheduling element
configuration, streamlining how vport QoS is initialized and adjusted.

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/20241107194357.683732-7-tariqt@nvidia.com


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