fix(e2e): clean kubeconfig discovery without diagnostic overhead

Simplified kubeconfig discovery. Search standard paths and exit 0
immediately upon finding one.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/e2e.yaml

@@ -45,49 +45,18 @@ jobs:
       - name: Setup kubectl
         uses: azure/setup-kubectl@v4
 
-      - name: Get kubeconfig via kubectl config
+      - name: Get kubeconfig
         run: |
           set -euo pipefail
-          echo "HOME=${HOME}"
-          echo "KUBERNETES_SERVICE_HOST=${KUBERNETES_SERVICE_HOST:-<unset>}"
-          echo "KUBERNETES_SERVICE_PORT=${KUBERNETES_SERVICE_PORT:-<unset>}"
-          echo "Checking service account token..."
-          if [ -f /var/run/secrets/kubernetes.io/serviceaccount/token ]; then
-            echo "Service account token found"
-            KUBECONFIG=/tmp/kubeconfig-incluster
-            cat > "$KUBECONFIG" <<EOF
-apiVersion: v1
-kind: Config
-clusters:
-- cluster:
-    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
-    server: https://${KUBERNETES_SERVICE_HOST:-kubernetes.default.svc}:${KUBERNETES_SERVICE_PORT:-443}
-  name: in-cluster
-contexts:
-- context:
-    cluster: in-cluster
-    namespace: headlamp-dev
-    user: runner-sa
-  name: in-cluster
-current-context: in-cluster
-users:
-- name: runner-sa
-  user:
-    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
-EOF
-            echo "KUBECONFIG=${KUBECONFIG}" >> "$GITHUB_ENV"
-          else
-            echo "::error::No service account token found"
-            exit 1
-          fi
-          echo "Testing kubectl apply dry-run (no KUBECONFIG set)..."
-          kubectl apply -f deployment/e2e-ci-runner-rbac.yaml --dry-run=server 2>&1 | head -5 || true
-          echo "Testing kubectl apply dry-run with KUBECONFIG=${KUBECONFIG}..."
-          KUBECONFIG=/tmp/kubeconfig-incluster kubectl apply -f deployment/e2e-ci-runner-rbac.yaml --dry-run=server 2>&1 | head -5 || true
-          echo "Testing kubectl auth can-i (no KUBECONFIG)..."
-          kubectl auth can-i create roles -n headlamp-dev 2>&1 || true
-          echo "Testing kubectl auth can-i (with KUBECONFIG)..."
-          KUBECONFIG=/tmp/kubeconfig-incluster kubectl auth can-i create roles -n headlamp-dev 2>&1 || true
+          for path in /runner /runner/config "$HOME/.kube" "$HOME/.kube/config" /home/runner/.kube /home/runner/.kube/config; do
+            if [ -f "$path" ]; then
+              echo "KUBECONFIG=${path}" >> "$GITHUB_ENV"
+              echo "Found kubeconfig at ${path}"
+              kubectl cluster-info --request-timeout=5s
+              exit 0
+            fi
+          done
+          echo "No kubeconfig found; kubectl will use default config"
 
       - name: Apply RBAC for E2E pipeline
         run: |