Axis discovery MAC filter (#24442)

* Make sure to abort if the MAC is not from Axis

* Fix tests

* Andrew Sayre suggestion

Co-Authored-By: Andrew Sayre <6730289+andrewsayre@users.noreply.github.com>

homeassistant/components/axis/strings.json

@@ -21,7 +21,8 @@
         "abort": {
             "already_configured": "Device is already configured",
             "bad_config_file": "Bad data from config file",
-            "link_local_address": "Link local addresses are not supported"
+            "link_local_address": "Link local addresses are not supported",
+            "not_axis_device": "Discovered device not an Axis device"
         }
     }
-}
+}