tests_gaudi: Fix image name in hccl job yaml

This PR fixes the image name by correcting the namespace to gaudi-validation which is the one currently being used in order to avoid the ErrImagePull error due
the incorrect namespace.

Signed-off-by: Gabriela Cervantes <gabriela.cervantes.tellez@intel.com>

Author: GabyCT

tests/gaudi/l2/hccl_job.yaml

@@ -11,7 +11,7 @@ spec:
       serviceAccountName: hccl-demo-anyuid-sa
       containers:
         - name: hccl-demo-workload
-          image: image-registry.openshift-image-registry.svc:5000/hccl-demo/hccl-demo-workload:1.18.0-524
+          image: image-registry.openshift-image-registry.svc:5000/gaudi-validation/hccl-demo-workload:1.18.0-524
           workingDir: "/hccl_demo"
           command: ["/bin/bash",  "-c", "--"]
           ## sleep for 20 seconds to avoid race condition 
@@ -26,4 +26,4 @@ spec:
           resources:
             limits:
               habana.ai/gaudi: 8
-          imagePullPolicy: IfNotPresent
+          imagePullPolicy: IfNotPresent