kubernetes: add agnhost command in pod yaml

Add agnhost command in yaml to make the test run.

Fixes: kata-containers#5619

Signed-off-by: Linda Yu <linda.yu@intel.com>

Author: LindaYu17

integration/kubernetes/runtimeclass_workloads/deployment-expose-ip.yaml

@@ -23,6 +23,8 @@ spec:
       containers:
       - name: hello-world
         image: ${agnhost_image}
+        command:
+        - /agnhost
         args:
         - netexec
         ports:

integration/kubernetes/runtimeclass_workloads/pod-empty-dir-fsgroup.yaml

@@ -16,6 +16,8 @@ spec:
   containers:
   - name: mounttest-container
     image: ${agnhost_image}
+    command:
+      - /agnhost
     args:
       - mounttest
       - --fs_type=/test-volume
@@ -27,6 +29,8 @@ spec:
         mountPath: /test-volume
   - name: mounttest-container-2
     image: ${agnhost_image}
+    command:
+      - /agnhost
     args:
       - mounttest
       - --fs_type=/test-volume-2

integration/kubernetes/runtimeclass_workloads/pod-http-liveness.yaml

@@ -15,6 +15,8 @@ spec:
   containers:
   - name: liveness
     image: ${agnhost_image}
+    command:
+    - /agnhost
     args:
     - liveness
     livenessProbe:

integration/kubernetes/runtimeclass_workloads/pod-tcp-liveness.yaml

@@ -15,6 +15,8 @@ spec:
   containers:
   - name: tcp-liveness
     image: ${agnhost_image}
+    command:
+    - /agnhost
     args:
     - liveness
     ports: