flexibility in the configuration of resources for cilium

roles/network_plugin/cilium/templates/cilium/ds.yml.j2

@@ -121,13 +121,27 @@ spec:
             exec:
               command:
               - /cni-uninstall.sh
+{% if cilium_cpu_limit or cilium_memory_limit or cilium_cpu_requests or cilium_memory_requests %}
         resources:
+{% if cilium_cpu_limit or cilium_memory_limit %}
           limits:
+{% if cilium_cpu_limit %}
             cpu: {{ cilium_cpu_limit }}
+{% endif %}
+{% if cilium_memory_limit %}
             memory: {{ cilium_memory_limit }}
+{% endif %}
+{% endif %}
+{% if cilium_cpu_requests or cilium_memory_requests %}
           requests:
+{% if cilium_cpu_requests %}
             cpu: {{ cilium_cpu_requests }}
+{% endif %}
+{% if cilium_memory_requests %}
             memory: {{ cilium_memory_requests }}
+{% endif %}
+{% endif %}
+{% endif %}
 {% if cilium_enable_prometheus or cilium_enable_hubble_metrics %}
         ports:
 {% endif %}