ci_results_archiver: shard BQ uploads

Change-Id: Ic00cb147b499f955e450a0c16935b8e41e9ba25b
Bug: b:233065164

.gitignore

diff --git a/.gitignore b/.gitignore
index 41e7fcf..083d206 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,6 @@
 /.coverage
 /chromite/*
 /cmd/*
+
+chromite/
+.idea/
\ No newline at end of file

ci_results_archiver/bigquery_dumper.py

diff --git a/ci_results_archiver/bigquery_dumper.py b/ci_results_archiver/bigquery_dumper.py
index 6520612..d0e215d 100644
--- a/ci_results_archiver/bigquery_dumper.py
+++ b/ci_results_archiver/bigquery_dumper.py
@@ -32,6 +32,6 @@
     if not table_suffixes:
       return
     for table_suffix in sorted(table_suffixes):
-      destination_url = 'gs://%s/archives/%s%s.json.gz' % (
+      destination_url = 'gs://%s/archives/%s%s-*.json.gz' % (
           self._bucket_name, self._table_spec.table_prefix, table_suffix)
       self._bigquery_tables.ExportToStorage(table_suffix, destination_url)