1. Proposed title of this feature request

This request is to include sport parameter to the Kubernetes nmstate like we have with nmcli command line:

nmcli con mod <interface-name> +ipv4.routing-rules "priority <number> from <IP> sport <port-number> table 101"

Note that the nmstate does not support sport in any available version as mentioned below:

route-rules.config[2]: unknown field `sport`, expected one of `family`, `state`, `ip-from`, `ip-to`, `priority`, `route-table`, `fwmark`, `fwmask`, `action`, `iif`, `suppress-prefix-length`, `suppress_prefixlength 

2. What is the nature and description of the request?
The routing workarounds need to have ip rule configuration and it is not available in the nmstate 

3. Why does the customer need this? (List the business requirements here)
Customer needs to apply routing rules to secondary networks. 

4. List any affected packages or components.
NMSTATE 

Kubernetes NMSTATE