Add public ip to hosts & derive geolocation when rendering host (#4652)

* geoip wip
* return nil if ip is empty string or if ParseIP returns nil
* add ui component to render geolocation if available, address PR feedback
* render public ip if available
* add changes file, document geoip in deployment guide
* update rest-api docs

cmd/fleetctl/testdata/expectedHostDetailResponseJson.json

@@ -31,6 +31,7 @@
     "hardware_version":"",
     "hardware_serial":"",
     "computer_name":"test_host",
+    "public_ip": "",
     "primary_ip":"",
     "primary_mac":"",
     "distributed_interval":0,

cmd/fleetctl/testdata/expectedHostDetailResponseYaml.yml

@@ -63,6 +63,7 @@ spec:
       created_at: "0001-01-01T00:00:00Z"
       updated_at: "0001-01-01T00:00:00Z"
   policy_updated_at: "0001-01-01T00:00:00Z"
+  public_ip: ""
   primary_ip: ""
   primary_mac: ""
   refetch_requested: false

cmd/fleetctl/testdata/expectedListHostsJson.json

@@ -31,6 +31,7 @@
     "hardware_version":"",
     "hardware_serial":"",
     "computer_name":"test_host",
+    "public_ip": "",
     "primary_ip":"",
     "primary_mac":"",
     "distributed_interval":0,
@@ -90,6 +91,7 @@
     "hardware_version":"",
     "hardware_serial":"",
     "computer_name":"test_host2",
+    "public_ip": "",
     "primary_ip":"",
     "primary_mac":"",
     "distributed_interval":0,

cmd/fleetctl/testdata/expectedListHostsYaml.yml

@@ -40,6 +40,7 @@ spec:
   platform: ""
   platform_like: ""
   policy_updated_at: "0001-01-01T00:00:00Z"
+  public_ip: ""
   primary_ip: ""
   primary_mac: ""
   refetch_requested: false
@@ -88,6 +89,7 @@ spec:
   platform: ""
   platform_like: ""
   policy_updated_at: "0001-01-01T00:00:00Z"
+  public_ip: ""
   primary_ip: ""
   primary_mac: ""
   refetch_requested: false