add prow job

Author: mjudeikis

.prow.yaml

@@ -10,4 +10,23 @@ presubmits:
       - image: ghcr.io/kcp-dev/infra/build:1.21.8-1
         command:
         - make
-        - test
+        - test
+
+  - name: pull-kcp-test-e2e
+    decorate: true
+    # only run e2e tests if code changed.
+    run_if_changed: "(cmd|config|pkg|sdk|test|go.mod|go.sum|Makefile|.prow.yaml)"
+    clone_uri: "https://github.com/kcp-dev/controller-runtime"
+    labels:
+      preset-goproxy: "true"
+    spec:
+      containers:
+        - image: ghcr.io/kcp-dev/infra/build:1.20.13-1
+          command:
+            - cd examples/kcp
+            - make kcp-server kcp-controller
+            - make test
+          resources:
+            requests:
+              memory: 6Gi
+              cpu: 4