add new rep locations (#1115)

Author: jialuoo

bigframes/constants.py

@@ -84,8 +84,17 @@
         "europe-west9",
         "europe-west8",
         "me-central2",
+        "us-central1",
+        "us-central2",
+        "us-east1",
         "us-east4",
+        "us-east5",
+        "us-east7",
+        "us-south1",
         "us-west1",
+        "us-west2",
+        "us-west3",
+        "us-west4",
     }
 )