Only pull credential from the fleet on crash (#2645)

Only crash has the policy controller installed for now.

jetty/deploy-nomulus-for-env.sh

@@ -33,7 +33,13 @@ while read line
 do
   parts=(${line})
   echo "Updating cluster ${parts[0]} in location ${parts[1]}..."
-  gcloud container fleet memberships get-credentials "${parts[0]}" --project "${project}"
+  if [[ ${environment} == "crash" ]]
+  then
+    gcloud container fleet memberships get-credentials "${parts[0]}" --project "${project}"
+  else
+    gcloud container clusters get-credentials "${parts[0]}" \
+    --project "${project}" --location "${parts[1]}"
+  fi
   for service in frontend backend pubapi console
   do
     sed s/GCP_PROJECT/"${project}"/g "./kubernetes/nomulus-${service}.yaml" | \