Remove nil attributes for CiliumNetworkPolicy

Nil attributes whether ingress or egress will
fail API for update

lib/gitlab/kubernetes/cilium_network_policy.rb

@@ -82,7 +82,7 @@ module Gitlab
           endpointSelector: selector,
           ingress: ingress,
           egress: egress
-        }
+        }.compact!
       end
 
       override :kind

spec/lib/gitlab/kubernetes/cilium_network_policy_spec.rb

@@ -20,7 +20,7 @@ RSpec.describe Gitlab::Kubernetes::CiliumNetworkPolicy do
       kind: partial_class_name,
       apiVersion: "cilium.io/v2",
       metadata: { name: name, namespace: namespace, resourceVersion: resource_version },
-      spec: { endpointSelector: endpoint_selector, ingress: ingress, egress: nil }
+      spec: { endpointSelector: endpoint_selector, ingress: ingress }
     )
   end
 
@@ -61,7 +61,7 @@ RSpec.describe Gitlab::Kubernetes::CiliumNetworkPolicy do
       )
     end
 
-    let(:spec) { { endpointSelector: selector, ingress: ingress, egress: nil } }
+    let(:spec) { { endpointSelector: selector, ingress: ingress } }
     let(:metadata) { { name: name, namespace: namespace, resourceVersion: resource_version } }
   end
 
@@ -180,7 +180,7 @@ RSpec.describe Gitlab::Kubernetes::CiliumNetworkPolicy do
         kind: partial_class_name,
         apiVersion: "cilium.io/v2",
         metadata: { name: name, namespace: namespace, resourceVersion: resource_version, labels: { app: 'foo' } },
-        spec: { endpointSelector: endpoint_selector, ingress: ingress, egress: nil }
+        spec: { endpointSelector: endpoint_selector, ingress: ingress }
       )
     end