[db_schema] Adjust schema migration to support v.22+ of cockroachdb

build/db_schemas/rid/upto-v2.0.0-add_inverted_indices.sql

@@ -1,3 +1,7 @@
+-- From version 22.2.0, cockroach db sets the following variable to true by default.
+-- This is reverted to preserve the original behaviour.
+SET enable_implicit_transaction_for_batch_statements = false;
+
 -- Add inverted indices
 ALTER TABLE identification_service_areas ADD COLUMN IF NOT EXISTS cells INT64[];
 CREATE INVERTED INDEX IF NOT EXISTS cell_idx on identification_service_areas (cells);