chore: refactor pipelines (#96)

## Description

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At least please give us some description what you are trying to achieve and why your change is needed. -->

relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Reviewed-on: #96

.github/workflows/clean_up.yaml

@@ -38,12 +38,12 @@ jobs:
         uses: ./.github/actions/notify
         with:
           webhook_url: ${{ secrets.GOOGLE_WEBHOOK_URL }}
-          title: CI pipeline started
-          event_title: ${{ github.event.type }}
-          event_author: ${{ github.event.actor.login }}
+          title: CLEAN UP pipeline started
+          event_title: ${{ forgejo.event_name }}
+          event_author: ${{ forgejo.actor }}
           event_body: "Filter: ${{ inputs.res_prefix }}"
-          event_number: ${{ github.event.id }}
-          event_url: "https://tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/actions/runs/${{ github.run_id }}"
+          event_number: ${{ forgejo.run_number }}
+          event_url: "https://tf-provider.git.onstackit.cloud/stackit-dev-tools/terraform-provider-stackitprivatepreview/actions/runs/${{ forgejo.run_number }}"
 
       - name: Clean
         uses: ./.github/actions/clean_up