chore: refactor pipelines (#97)

## Description

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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: #97

.github/actions/acc_test/action.yaml

@@ -67,9 +67,13 @@ inputs:
 
 outputs:
   result:
-    value: ${{ steps.testrun.result }}
+    value: "${{ steps.testrun.result }}"
     description: "the output of the tests"
 
+  status:
+    value: "${{ steps.status.status }}"
+    description: "the status of the tests"
+
 runs:
   using: "composite"
   steps:
@@ -213,6 +217,8 @@ runs:
         fi
 
         testfile="${{ inputs.test_file }}"
+        
+        echo "result=no result before run" >> "$GITHUB_OUTPUT"
 
         echo "Running acceptance tests for the terraform provider"
         set +e
@@ -230,11 +236,14 @@ runs:
         echo "::endgroup::"
         set -e
         echo "::group::go test result"
-        if [ $? -ne 0 ]; then
+        
+        if [[ $(cat acc_test_run.log | grep "FAIL") ]]; then
           echo "Test failed, see acc_test_run.log for details"
           res=$(cat acc_test_run.log | grep -v "=== RUN" | grep -v "\-\-\- PASS" | grep -v "=== CONT" | grep -v "=== PAUSE")
-          echo "result=${res}" >> "$GITHUB_OUTPUT"
+          echo "result=FAIL: ${res}" >> "$GITHUB_OUTPUT"
           exit 1
+        else
+          echo "result=no FAIL detected" >> "$GITHUB_OUTPUT"
         fi
         echo "::endgroup::"
       env:
@@ -246,10 +255,12 @@ runs:
         TF_ACC_KEK_KEY_VERSION: ${{ inputs.tf_acc_kek_key_version }}
         TF_ACC_KEK_SERVICE_ACCOUNT: ${{ inputs.tf_acc_kek_service_account }}
 
-    - name: Artifact upload start
+    - name: Set status output variable
+      if: always()
+      id: status
       shell: bash
       run: |
-        echo "::group::artifact upload"
+        echo "status=${{ steps.testrun.outcome == 'success' && 'SUCCESS' || 'FAILURE' }}" >> "$GITHUB_OUTPUT"
 
     - name: Upload test log artifact
       if: always()
@@ -257,8 +268,3 @@ runs:
       with:
         name: acc_test.log
         path: "stackit/acc_test_run.log"
-
-    - name: Artifact upload finish
-      shell: bash
-      run: |
-        echo "::endgroup::"