net/mlx5: validate connection tracking action

net/mlx5: validate connection tracking action

The validation of a CT action contains two parts. The first is the
CT action configurations parameter. When creating a CT action
context, some members need to be verified.

The second is that when creating a flow, the DR action of CT should
be validated with other actions and items as well. Currently, only
the TCP protocol support connection tracking.

Signed-off-by: Bing Zhao <bingz@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>