Support Namespaced Antrea NetworkPolicy CRD

[abhiraut]

Describe what you are trying to solve
Existing K8s NetworkPolicy API do not support a way to select external entities and other resources like Nodes, Services etc, in its spec and support other features like logging of Rules.

Describe the solution you have in mind
Introduce a Namespace scoped Antrea NetworkPolicy CRD to support additional features unsupported by K8s NetworkPolicy APIs.

Describe how your solution impacts user flows
See doc -> https://docs.google.com/document/d/1L077FgfVr1o-9RCwd3YIXe9atBImxdxpRhhayew6kgA/edit?usp=sharing

Describe the main design/architecture of your solution
See doc -> https://docs.google.com/document/d/1L077FgfVr1o-9RCwd3YIXe9atBImxdxpRhhayew6kgA/edit?usp=sharing

Alternative solutions that you considered
Upstream required features in the K8s NetworkPolicy spec. This may take a while.

Test plan
Add unit tests and e2e tests.

Additional context

• Implement API types Add support for Namespace scoped NetworkPolicy CRD #775
• Implement AntreaNetworkPolicy controller Enable AntreaNetworkPolicy CRD  #1117
• Implement agent side Antrea NP controller Enable AntreaNetworkPolicy CRD  #1117
• Ensure e2e tests Enable AntreaNetworkPolicy CRD  #1117
• Document Add Antrea NetworkPolicy documentation #1194