1. Proposed title of this feature request
Ingress Node Firewall Operator - Allow Multiple ports/port-ranges within a single rule

2. What is the nature and description of the request?

Currently Ingress Node Firewall (IngressNodeFirewall) supports definition of either a single port or a range of ports within a single rule. So for each port or port range, a specific rule set to be created for the same Source CIDR. In order to allow/deny multiple ports within a same rule, `comma` separated values (sample pasted below) would bring more value to customers using this operator thus they don't need to create multiple rule(s) for each port or port-range. 

spec:
  ingress:
    - rules:
        - action: Allow
          order: 10
          protocolConfig:
            tcp:
              ports: 22,80,443,2379-2380,3100,32000-32767
            protocol: TCP
      sourceCIDRs:
        - 192.168.40.10/32

3. Why does the customer need this? (List the business requirements here)

Firstly, it simplifies the definition of adding/modifying/removing ports within IngressNodeFirewall.
Secondly, from customer point of view, it will be easier to manage multiple port or port-range definitions within single array of rule instead of opening multiple rules for each port or range customer would like to define. 

4. List any affected packages or components.
N/A