test/k8s: Add basic attestation test

- Add basic test case to check that a ruuning
pod can use the api-server-rest (and attestation-agent
and confidential-data-hub indirectly) to get a resource
from a remote KBS

Fixes #9057

Signed-off-by: Gabriela Cervantes <gabriela.cervantes.tellez@intel.com>
Co-authored-by: Linda Yu <linda.yu@intel.com>
Co-authored-by: stevenhorsman <steven@uk.ibm.com>
Co-authored-by: Wainer dos Santos Moschetta <wainersm@redhat.com>

tests/integration/kubernetes/runtimeclass_workloads/pod-attestable.yaml

@@ -0,0 +1,19 @@
+# Copyright (c) 2023-2024 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+apiVersion: v1
+kind: Pod
+metadata:
+  name: aa-test-cc
+spec:
+  runtimeClassName: kata
+  containers:
+    - name: bash-curl
+      image: storytel/alpine-bash-curl:latest
+      imagePullPolicy: Always
+      command:
+        - sh
+        - -c
+        - |
+          curl http://127.0.0.1:8006/cdh/resource/default/aa/key; sleep 1000