Add test_k8s_dashboard test

Add 'cluster role binding' api wrapper
Add method in TestMCPK8sActions to read testdata yamls

Change-Id: I7b9f7a74ce74ea5e722cb4c958bd60b6a64b6a0c
Related-PROD: PROD-22249
diff --git a/tcp_tests/tests/system/testdata/k8s/test-admin-user-account.yaml b/tcp_tests/tests/system/testdata/k8s/test-admin-user-account.yaml
new file mode 100644
index 0000000..889fa48
--- /dev/null
+++ b/tcp_tests/tests/system/testdata/k8s/test-admin-user-account.yaml
@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: test-admin-user
+  namespace: kube-system