feat: add catalog columns needed for retention policy

iox_catalog/migrations/20221101170001_add_cols_for_retention_policy.sql

@@ -0,0 +1,6 @@
+ALTER TABLE IF EXISTS namespace
+    ADD COLUMN IF NOT EXISTS retention_period_ns BIGINT DEFAULT NULL;
+
+
+ALTER TABLE IF EXISTS partition
+    ADD COLUMN IF NOT EXISTS to_delete BIGINT DEFAULT NULL;