Added triggers for workflows again

.github/workflows/ci_pipeline.yml

 name: CI pipeline for pySDC
 
 on:
-  # push:
-  # pull_request:
+  push:
+  pull_request:
   schedule:
     - cron: '1 5 * * 1'
 

.github/workflows/gitlab_ci.yml

 name: Mirror to Gitlab to trigger CI
 
 on:
-  # push:
+  push:
   pull_request_target:
   schedule:
     - cron: '1 5 2 * *'