add pg-repack after create permissions script

Author: olirice

ansible/files/postgresql_extension_custom_scripts/pg_repack/after-create.sql

@@ -0,0 +1,4 @@
+grant all on all tables in schema repack to postgres;
+grant all on schema repack to postgres;
+alter default privileges in schema repack grant all on tables to postgres;
+alter default privileges in schema repack grant all on sequences to postgres;