gh: use workflow_run trigger for copr

.github/workflows/release.yml

@@ -219,25 +219,3 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract plain version
-        id: plain_version
-        run: |
-          set -e
-          if [[ "$TAG" == v* ]]; then
-            VERSION="${TAG#v}"
-          else
-            VERSION="$TAG"
-          fi
-          echo "plain=$VERSION" >> "$GITHUB_OUTPUT"
-
-      - name: Trigger Copr release workflow
-        run: |
-          set -euo pipefail
-          VERSION="${{ steps.plain_version.outputs.plain }}"
-          JSON_PAYLOAD=$(jq -n --arg version "$VERSION" '{inputs:{version:$version}}')
-          curl -X POST \
-               -H "Accept: application/vnd.github+json" \
-               -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
-               -H "X-GitHub-Api-Version: 2022-11-28" \
-               https://api.github.com/repos/${{ github.repository }}/actions/workflows/copr-release.yml/dispatches \
-               -d "$JSON_PAYLOAD"