TL;DR: safer deployment and minor fixes

- Instead of modifying cdb_service_quota_info to return max_batch_size,
a new type (service_quota_info_batch) and a new function
(cdb_service_quota_info_batch) are created. That makes deployment safe.
- Fixes geocoding with forced batch size 1.
- Improves namespacing for count_estimate (->
cdb_dataservices_client.cdb_count_estimate).
- Improves namespacing for jsonb_array_casttext (->
cdb_dataservices_client.cdb_jsonb_array_casttext).

client/renderer/interface.yaml

@@ -517,6 +517,13 @@
   params:
     - {}
 
+- name: cdb_service_quota_info_batch
+  return_type: SETOF service_quota_info_batch
+  multi_row: true
+  multi_field: true
+  params:
+    - {}
+
 - name: cdb_enough_quota
   return_type: BOOLEAN
   params: