remove k8s node selector (#5162)

Remove node selector from K8s jobs template. This node selector was
necessary while we had a single cluster for running both the kata jobs
and the cronjobs.

Now we have a separate cluster for kata jobs, and removing the node
selector allow us to have many different node pools able to run kata
containers.

Signed-off-by: Javan Lacerda <javanlacerda@google.com>

Author: javanlacerda

src/clusterfuzz/_internal/k8s/job_template.yaml

@@ -85,9 +85,5 @@ spec:
         emptyDir:
           medium: Memory
           sizeLimit: 1.9Gi
-      {% if is_kata %}
-      nodeSelector:
-        cloud.google.com/gke-nodepool: kata-enabled-pool
-      {% endif %}
       restartPolicy: "{{restart_policy}}"
-  backoffLimit: 0
+  backoffLimit: 0