Refactor cleanup steps to use cleanup_lxc function (#9354)

install/part-db-install.sh

@@ -62,6 +62,8 @@ ADMIN_PASS=$(grep -oP 'The initial password for the "admin" user is: \K\w+' ~/da
   echo "Part-DB Admin User: admin"
   echo "Part-DB Admin Password: $ADMIN_PASS"
 } >>~/partdb.creds
+rm -rf ~/database-migration-output
+rm -rf "/opt/v${RELEASE}.zip"
 echo "${RELEASE}" >/opt/${APPLICATION}_version.txt
 msg_ok "Installed Part-DB"
 
@@ -88,11 +90,4 @@ msg_ok "Created Service"
 
 motd_ssh
 customize
-
-msg_info "Cleaning up"
-rm -rf ~/database-migration-output
-rm -rf "/opt/v${RELEASE}.zip"
-$STD apt -y autoremove
-$STD apt -y autoclean
-$STD apt -y clean
-msg_ok "Cleaned"
+cleanup_lxc