fix: overhaul of server streaming retries

gax/src/gax.ts

@@ -386,6 +386,15 @@ export function convertRetryOptions(
     // this is in seconds and needs to be converted to milliseconds and the totalTimeoutMillis parameter
     if (options.retryRequestOptions.totalTimeout !== undefined) {
       totalTimeoutMillis = options.retryRequestOptions.totalTimeout * 1000;
+    } else {
+      if (options.maxRetries === undefined) {
+        totalTimeoutMillis = 30000;
+        warn(
+          'retry_request_options_no_max_retries_timeout',
+          'Neither maxRetries nor totalTimeout were passed. Defaulting to totalTimeout of 30000ms.',
+          'MissingParameterWarning'
+        );
+      }
     }
 
     // for the variables the user wants to override, override in the backoff settings object we made