Support showing NSX LB SNAT IP in networkinfo CR

[timdengyun]

Getting VPC Ppolicy Tier1 uplink port IP as NSX LB SNAT IP in order to present it in networkinfo CR loadBalancerIPAddresses field.

Test done:
NSX API output for vpc-vw8t for VPC T1 uplink and downlink Port info

GET https://10.192.27.76/policy/api/v1/infra/realized-state/realized-entities?intent_path=/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/vpcs/vpc-vw8t
{
            "extended_attributes": [
                {
                    "data_type": "STRING",
                    "multivalue": true,
                    "values": [
                        "100.64.0.2/31"
                    ],
                    "key": "IpAddresses"
                },
                {
                    "data_type": "STRING",
                    "multivalue": false,
                    "values": [
                        "02:50:56:56:44:52"
                    ],
                    "key": "MacAddress"
                }
            ],
            "entity_type": "RealizedLogicalRouterPort",
            "intent_paths": [
                "/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/vpcs/vpc-vw8t",
                "/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/transit-gateways/default"
            ],
            "resource_type": "GenericPolicyRealizedResource",
            "id": "vpc-vw8t",
            "display_name": "default-vpc-vw8t-t0_lrp",
            "path": "/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/realized-state/enforcement-points/default/transit-gateways/default/vpc-interfaces/vpc-vw8t",
            "relative_path": "vpc-vw8t",
           ..
        },
{
            "extended_attributes": [
                {
                    "data_type": "STRING",
                    "multivalue": true,
                    "values": [
                        "100.64.0.3/31"
                    ],
                    "key": "IpAddresses"
                },
                {
                    "data_type": "STRING",
                    "multivalue": false,
                    "values": [
                        "02:50:56:56:44:55"
                    ],
                    "key": "MacAddress"
                }
            ],
            "entity_type": "RealizedLogicalRouterPort",
            "intent_paths": [
                "/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/vpcs/vpc-vw8t"
            ],
            "resource_type": "GenericPolicyRealizedResource",
            "id": "gateway-interface",
            "display_name": "default-vpc-vw8t-t1_lrp",
            "path": "/orgs/default/projects/a9425f85-3da3-462d-9957-c44d729d7e63/realized-state/enforcement-points/default/vpcs/vpc-vw8t/gateway-interface",
            "relative_path": "gateway-interface",
                 ..
        },

This PR is to show 100.64.0.3 as loadBalancerIPAddresses SNAT IP for namespace: ns-1 which is associated with VPC vpc-vw8t

kubectl get networkinfo ns-1 -nns-1 -o yaml
apiVersion: crd.nsx.vmware.com/v1alpha1
kind: NetworkInfo
metadata:
  creationTimestamp: "2025-01-21T17:16:23Z"
  generation: 3
  name: ns-1
  namespace: ns-1
  resourceVersion: "5848475"
  uid: 6bb633fc-08c8-4f95-9ca2-829033b6c2b2
vpcs:
- defaultSNATIP: 10.1.0.1
  loadBalancerIPAddresses: 100.64.0.3
  name: vpc-vw8t
  privateIPs:
  - 192.168.0.0/16

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.27273% with 7 lines in your changes missing coverage. Please review.

Project coverage is 74.30%. Comparing base (6c54354) to head (bbb2e85).

Files with missing lines	Patch %	Lines
.../controllers/networkinfo/networkinfo_controller.go	81.81%	4 Missing ⚠️
pkg/nsx/services/vpc/vpc.go	76.92%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1018      +/-   ##
==========================================
+ Coverage   74.24%   74.30%   +0.05%     
==========================================
  Files         118      118              
  Lines       16398    16445      +47     
==========================================
+ Hits        12175    12219      +44     
- Misses       3453     3455       +2     
- Partials      770      771       +1     

Flag	Coverage Δ
unit-tests	74.30% <87.27%> (+0.05%)	⬆️

Files with missing lines	Coverage Δ
pkg/nsx/services/realizestate/realize_state.go	100.00% <100.00%> (ø)
pkg/nsx/services/vpc/vpc.go	55.37% <76.92%> (+0.28%)	⬆️
.../controllers/networkinfo/networkinfo_controller.go	69.05% <81.81%> (+0.94%)	⬆️