add github action for checking if imagestreams are properly regenerated

.github/workflows/check-imagestreams.yml

@@ -0,0 +1,54 @@
+---
+name: Imagestreamfiles check
+on:
+  issue_comment:
+    types:
+      - created
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    name: "Check imagestream generator generated files"
+    runs-on: ubuntu-20.04
+    if: |
+      github.event.issue.pull_request
+      && (contains(github.event.comment.body, '[test]') || contains(github.event.comment.body, '[test-all]'))
+      && contains(fromJson('["OWNER", "MEMBER"]'), github.event.comment.author_association)
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Check imagestream files
+        id: check
+        shell: bash
+        run: |
+          sudo apt -y update && sudo apt install -y python3-yaml
+          git clone https://github.com/sclorg/ci-scripts.git ci-scripts
+          sha=$(git rev-parse HEAD)
+          result="success"
+          python ci-scripts/ocp-stream-generator/ocp-stream-generator/stream_generator.py
+          git diff --exit-code -- imagestreams || result="failure"
+          echo "result=$result" >> "$GITHUB_OUTPUT"
+          echo "sha=$sha" >> "$GITHUB_OUTPUT"
+
+      - name: Set final commit status
+        uses: myrotvorets/[email protected]
+        with:
+          status: ${{ steps.check.outputs.result }}
+          context: "Imagestream files check"
+          sha: ${{ steps.check.outputs.sha }}
+
+      - name: Exit on ERR
+        shell: bash
+        run: |
+          _result=${{ steps.check.outputs.result }}
+          if [ "$_result" == failure ]; then
+            git show -s -- imagestreams
+            echo "::error::Imagestream files are not regenerated properly."
+            echo "::warning::Please use 'sclorg/ci-scripts/ocp-stream-generator'"
+            echo "::warning::to regenerate them."
+            exit 1
+          fi
+...