Update dump_devinfo for raw discovery json and common redactors (#1358)

This PR does a few related things to dump_devinfo:

- Store the raw discovery result in the fixture.
- Consolidate redaction logic so it's not duplicated in dump_devinfo.
- Update existing fixtures to:
  - Store raw discovery result under `result`
  - Use `SCRUBBED_CHILD_DEVICE_ID` everywhere
  - Have correct values as per the consolidated redactors.

kasa/protocols/protocol.py

@@ -66,6 +66,8 @@ def redact_data(data: _T, redactors: dict[str, Callable[[Any], Any] | None]) ->
 
 def mask_mac(mac: str) -> str:
     """Return mac address with last two octects blanked."""
+    if len(mac) == 12:
+        return f"{mac[:6]}000000"
     delim = ":" if ":" in mac else "-"
     rest = delim.join(format(s, "02x") for s in bytes.fromhex("000000"))
     return f"{mac[:8]}{delim}{rest}"