chore: add cleanup for qemu bootstrap (supabase#1479)

* chore: add cleanup for qemu bootstrap

* chore: bump pg15 version

Author: dragarcia

ansible/vars.yml

@@ -9,7 +9,7 @@ postgres_major:
 # Full version strings for each major version
 postgres_release:
   postgresorioledb-17: "17.0.1.047-orioledb"
-  postgres15: "15.8.1.054"
+  postgres15: "15.8.1.055"
 
 # Non Postgres Extensions
 pgbouncer_release: "1.19.0"

ebssurrogate/scripts/qemu-bootstrap-nix.sh

@@ -145,4 +145,5 @@ install_nix
 execute_stage2_playbook
 # we do not want to ship an initialized DB as this is performed as needed
 rm -rf /data/pgdata
+clean_system
 cloud-init clean --logs