Change: Use a single workflow file for releases

Merge manual and automatic releases (via PR label) into a single
CI workflow.

Note: strategy calendar must be changed to patch for the stable branch.
(cherry picked from commit 7a56efd)

.github/workflows/release-pontos.yml

@@ -0,0 +1,34 @@
+name: Release gvm-libs with pontos
+
+on:
+  pull_request:
+    types: [closed]
+  workflow_dispatch:
+
+jobs:
+  build-and-release:
+    name: Create a new release with pontos
+    # If the event is a workflow_dispatch or the label 'make release' is set and PR is closed because of a merge
+    if: (github.event_name == 'workflow_dispatch') || (contains( github.event.pull_request.labels.*.name, 'make release') && github.event.pull_request.merged == true)
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: Setting the Reference
+        run: |
+          if [[ "${{ github.event_name }}" = "workflow_dispatch" ]]; then
+            echo "RELEASE_REF=${{ github.ref_name }}" >> $GITHUB_ENV
+          else
+            echo "RELEASE_REF=${{ github.base_ref }}" >> $GITHUB_ENV
+          fi
+      - name: Release with release action
+        uses: greenbone/actions/release@v2
+        with:
+          python-version: "3.10"
+          conventional-commits: true
+          github-user: ${{ secrets.GREENBONE_BOT }}
+          github-user-mail: ${{ secrets.GREENBONE_BOT_MAIL }}
+          github-user-token: ${{ secrets.GREENBONE_BOT_TOKEN }}
+          gpg-key: ${{ secrets.GPG_KEY }}
+          gpg-fingerprint: ${{ secrets.GPG_FINGERPRINT }}
+          gpg-passphrase: ${{ secrets.GPG_PASSPHRASE }}
+          strategy: calendar
+          ref: ${{ env.RELEASE_REF }}