Bandwidth plugin with NP is currently unsupported (#2572)

* Bandwidth plugin with NP

* Messaging review

Author: jayanthvn

README.md

@@ -572,6 +572,8 @@ Default: `false`
 
 Setting `ENABLE_BANDWIDTH_PLUGIN` to `true` will update `10-aws.conflist` to include upstream [bandwidth plugin](https://www.cni.dev/plugins/current/meta/bandwidth/) as a chained plugin.
 
+NOTE: Kubernetes Network Policy is supported in Amazon VPC CNI starting with version v1.14.0. Note that bandwidth plugin is not compatible with Amazon VPC CNI based Network policy. Network Policy agent uses TC (traffic classifier) system to enforce configured network policies for the pods. The policy enforcement will fail if bandwidth plugin is enabled due to conflict between TC configuration of bandwidth plugin and Network policy agent. We're exploring options to support bandwidth plugin along with Network policy feature and the issue is tracked [here](https://github.com/aws/aws-network-policy-agent/issues/68)
+
 #### `ANNOTATE_POD_IP` (v1.9.3+)
 
 Type: Boolean as a String