move prepare_scripts job to prepare stage

.gitlab-ci.yml

 stages:
   - prepare
-  - prepare_scripts
   - build_images
   - deploy
   - configure
@@ -326,10 +325,8 @@ build_my_bot:
 # prepare scripts
 
 prepare_scripts:
-  stage: prepare_scripts
+  stage: prepare
   retry: 2
-  needs:
-    - prepare_ssh_scripts # bug, if no needs, job cannot be triggered
   # when: manual
   image: $PYTHON_IMAGE
   allow_failure: false