chore: use repo metadata to populate nodejs CODEOWNERS (#435)

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/4df45cb9-66e5-4aca-9dbd-68127c02ae5d/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: googleapis/synthtool@318e351

packages/google-cloud-iot/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-iot.git",
-        "sha": "6077d60e1c9d66deeb4bec78ec67d2d7518308db"
+        "sha": "e5d97def2c6feb4b99ca03a7250ce20fd9a6bf47"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "57c23fa5705499a4181095ced81f0ee0933b64f6"
+        "sha": "318e351e26ba65b2b3cfa3f61b3b64e3540c3525"
       }
     }
   ],