feat: report Kea's HA peers and the firewall's config sync

get_dhcp_ha reads kea/dhcpv4/get (the ha section) and
kea/dhcpv4/searchPeer: whether Kea's HA hook is on, this firewall's peer
name -- the % twin when left at its default -- and each peer's name,
role and HA URL. get_config_sync reads core/hasync/get: the address this
firewall pushes its configuration to and the ticked sync items, mapped to
the service names get_services reports; items that are no service stay
under `unmapped`. Both raise when the request fails.

Configuration, not state: Kea's control agent, which knows whether the
pair is in hot standby right now, listens on localhost only.

Needs napalm-device-types 4.11.0 (ConfigSyncMixin). NetOrk/netork#1125.

pyproject.toml

@@ -24,7 +24,7 @@ classifiers = [
 ]
 dependencies = [
     "napalm>=4.0.0",
-    "napalm_device_types>=4.10.1",
+    "napalm_device_types>=4.11.0",
     "requests>=2.28.0",
 ]