refactor(ci): cleaner solution for destroy

ci/.gitlab-ci.yml

@@ -99,8 +99,8 @@ openstack:test:
   allow_failure: true
   needs: ["openstack:build"]
 
-# Template for OpenStack destroy jobs: terraform backend is set up with a script, terraform is initialized, infrastructure is destroyed.
-.destroy_job: &destroy_job
+# OpenStack destroy job: terraform backend is set up with a script, terraform is initialized, infrastructure is destroyed. Destroy is executed regardless of previous jobs.
+openstack:destroy:
   <<: *pipeline_template
   stage: destroy
   script:
@@ -109,21 +109,4 @@ openstack:test:
     - . ../ci/scripts/set-backend-config.sh $TERRAFORM_STATE_ADDRESS openstack-terraform-state $GITLAB_ACCESS_TOKEN
     - terraform init -reconfigure
     - terraform destroy -auto-approve
-
-# Destroy job executed on test success
-openstack:destroy_test_success:
-  <<: *destroy_job
-  needs: ["openstack:test"]
-  when: on_success
-
-# Destroy job executed on test failure
-openstack:destroy_test_failure:
-  <<: *destroy_job
-  needs: ["openstack:test"]
-  when: on_failure
-
-# Destroy job executed on build failure
-openstack:destroy_build_failure:
-  <<: *destroy_job
-  needs: ["openstack:build"]
-  when: on_failure
+  when: always