refactor!: rename get_dot1x_config to get_dot1x_ports

SwitchDriver and AccessPointDriver both declared get_dot1x_config, but they
meant different things and returned different shapes — Dot1XPortDict per port on
a switch, Dot1XConfigDict per SSID on an access point. A device that is both
could not satisfy both contracts.

napalm-device-types v1.0 names them apart. This is the switch side.

BREAKING CHANGE: get_dot1x_config is now get_dot1x_ports on NetgearPlusDriver.

napalm_netgear/netgear_plus.py

@@ -669,7 +669,7 @@ class NetgearPlusDriver(SwitchDriver):
         """
         return {}
 
-    def get_dot1x_config(self) -> dict[str, Any]:
+    def get_dot1x_ports(self) -> dict[str, Any]:
         """Return 802.1X port configuration.
 
         Not available via HTTP API.  Returns an empty dict.