refactor(nodejs): move build cop to flakybot (#618)

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Source-Link: googleapis/synthtool@57c23fa

packages/google-cloud-translate/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-translate.git",
-        "sha": "12066f64da5a3613dd00a72bb721bccf477208f4"
+        "sha": "a7778971408cfd8d672f5f141705a0a03c7dc74b"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "363fe305e9ce34a6cd53951c6ee5f997094b54ee"
+        "sha": "57c23fa5705499a4181095ced81f0ee0933b64f6"
       }
     }
   ],