Update e2e.yaml to use @main and pass plugin-name

Use @main workflow ref and add plugin-name input so the
reusable workflow can derive ConfigMap name and mount path.

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

.github/workflows/e2e.yaml

@@ -16,8 +16,9 @@ concurrency:
 
 jobs:
   e2e:
-    uses: privilegedescalation/.github/.github/workflows/plugin-e2e.yaml@hugh/add-pnpm-support-plugin-e2e
+    uses: privilegedescalation/.github/.github/workflows/plugin-e2e.yaml@main
     with:
       node-version: '22'
       headlamp-version: v0.40.1
       e2e-namespace: headlamp-dev
+      plugin-name: headlamp-kube-vip