fix: Cannot share client between appendRows and other function becaus… (#1290)

…e appendRows needs to recreate the client to manually inject headers need for regionalization

Author: yirutang

samples/snippets/src/main/java/com/example/bigquerystorage/WritePendingStream.java

@@ -65,7 +65,7 @@ public static void writePendingStream(String projectId, String datasetName, Stri
       // For more information about JsonStreamWriter, see:
       // https://googleapis.dev/java/google-cloud-bigquerystorage/latest/com/google/cloud/bigquery/storage/v1beta2/JsonStreamWriter.html
       try (JsonStreamWriter writer =
-          JsonStreamWriter.newBuilder(writeStream.getName(), writeStream.getTableSchema(), client)
+          JsonStreamWriter.newBuilder(writeStream.getName(), writeStream.getTableSchema())
               .build()) {
         // Append 10 JSON objects to the stream.
         for (int i = 0; i < 10; i++) {