Add test suite for tekton-kueue CEL expressions (#7561)

- Add hack/test-tekton-kueue-config.py with parameterized unittest
- Test all CEL mutation scenarios: multi-platform, priority assignment, queue config
- Dynamically read image from kustomization and config from development env
- Add GitHub action to run tests on kueue-related PRs

Validates tekton-kueue mutations against expected annotations, labels, and
priority classes using actual container via podman.

Also, update the tekton-kueue config on dev to match staging.

Assisted-By: Cursor

Signed-off-by: Gal Ben Haim <[email protected]>

Author: gbenhaim

.github/workflows/test-tekton-kueue-config.yaml

@@ -0,0 +1,45 @@
+name: Test Tekton-Kueue Configuration
+
+on:
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'components/kueue/**'
+      - 'hack/test-tekton-kueue-config.py'
+      - '.github/workflows/test-tekton-kueue-config.yaml'
+
+jobs:
+  test-tekton-kueue-config:
+    name: Test Tekton-Kueue CEL expressions
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install PyYAML
+
+      - name: Install Podman
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y podman
+
+      - name: Check prerequisites
+        run: |
+          python hack/test-tekton-kueue-config.py --check-setup
+
+      - name: Run Tekton-Kueue configuration tests
+        run: |
+          python hack/test-tekton-kueue-config.py --verbose
+
+      - name: Report success
+        if: success()
+        run: |
+          echo "✅ All Tekton-Kueue CEL expression tests passed successfully" 

components/kueue/development/tekton-kueue/config.yaml

@@ -10,7 +10,7 @@ cel:
           p.name == 'build-platforms')[0]
         .value.map(
           p,
-          annotation("kueue.konflux-ci.dev/requests-" + replace(p, "/", "-"), "1") 
+          annotation("kueue.konflux-ci.dev/requests-" + replace(replace(p, "/", "-"), "_", "-"), "1")
         ) : []
 
     # Set resource requests for multi platform pipelines which doesn't use the build-platforms parameter (old style)
@@ -24,7 +24,7 @@ cel:
       .filter(p, p.size() > 0)
       .map(
         p,
-        annotation("kueue.konflux-ci.dev/requests-" + replace(p[0].value, "/", "-"), "1")
+        annotation("kueue.konflux-ci.dev/requests-" + replace(replace(p[0].value, "/", "-"), "_", "-"), "1")
       ) : []
 
     # Set the pipeline priority