feat: add support to reference module nsgs in the nsg rules

[robo-cap]

Below is an example of how this can be used.

allow_rules_workers = {
    "Allow UDP ingress to workers for port range 50000-52767 from existing NSG" : {
      protocol = 17, destination_port_min = 50000, destination_port_max=52767, source = "ocid1.networksecuritygroup.oc1.eu-frankfurt-1.aaaaaaaai6z4le2ji7dkpmuwff4525b734wrjlifjqkrzlr5qctgxdsyoyra", source_type = "NETWORK_SECURITY_GROUP"
    },
  }

allow_rules_public_lb = {
    "Allow UDP egress to workers port range 50000-52767 from public LBs" : {
      protocol = 17, destination_port_min = 50000, destination_port_max=52767, destination = "workers", destination_type = "NETWORK_SECURITY_GROUP"
    },
  }

The supported nsgs to be referenced are: bastion, cp, int_lb, pub_lb, workers, operator, fss (when these are created).

[hyder]

If I understand this correctly, you are adding the custom rule and applying it in a 2nd terraform run. Is that correct?