Make sure test reporter prints out stderr, and disables Bigquery for non-contributors (#29073)

* print stderr to stderr, no bq if not contributor

* let test continue of bigquery fails

dev/bots/flutter_compact_formatter.dart

@@ -129,9 +129,16 @@ class FlutterCompactFormatter {
         }
         break;
       case 'error':
+        final String error = decoded['error'];
+        final String stackTrace = decoded['stackTrace'];
         if (originalResult != null) {
-          originalResult.errorMessage = decoded['error'];
-          originalResult.stackTrace = decoded['stackTrace'];
+          originalResult.errorMessage = error;
+          originalResult.stackTrace = stackTrace;
+        } else {
+          if (error != null)
+            stderr.writeln(error);
+          if (stackTrace != null)
+            stderr.writeln(stackTrace);
         }
         break;
       case 'print':

dev/bots/run_command.dart

@@ -50,6 +50,7 @@ Stream<String> runAndGetStdout(String executable, List<String> arguments, {
     environment: environment,
   );
 
+  stderr.addStream(process.stderr);
   final Stream<String> lines = process.stdout.transform(utf8.decoder).transform(const LineSplitter());
   await for (String line in lines) {
     yield line;

dev/bots/test.dart

@@ -148,9 +148,11 @@ Future<void> _runSmokeTests() async {
 Future<bq.BigqueryApi> _getBigqueryApi() async {
   // TODO(dnfield): How will we do this on LUCI?
   final String privateKey = Platform.environment['GCLOUD_SERVICE_ACCOUNT_KEY'];
-  if (privateKey == null || privateKey.isEmpty) {
+  // If we're on Cirrus and a non-collaborator is doing this, we can't get the key.
+  if (privateKey == null || privateKey.isEmpty || privateKey.startsWith('ENCRYPTED[')) {
     return null;
   }
+  try {
     final auth.ServiceAccountCredentials accountCredentials = auth.ServiceAccountCredentials( //.fromJson(credentials);
       'flutter-ci-test-reporter@flutter-infra.iam.gserviceaccount.com',
       auth.ClientId.serviceAccount('114390419920880060881.apps.googleusercontent.com'),
@@ -159,6 +161,11 @@ Future<bq.BigqueryApi> _getBigqueryApi() async {
     final List<String> scopes = <String>[bq.BigqueryApi.BigqueryInsertdataScope];
     final http.Client client = await auth.clientViaServiceAccount(accountCredentials, scopes);
     return bq.BigqueryApi(client);
+  } catch (e) {
+    print('Failed to get BigQuery API client.');
+    print(e);
+    return null;
+  }
 }
 
 Future<void> _runToolTests() async {