Backend: Use agent's egress IP rules to generate network policy to send to agent

MR: Use network policy egress of remote development... (!136286 - merged)

Description

Use the agent's egress IP rules to generate the network policy Kubernetes resources to be sent to the agent for the workspace.

Acceptance Criteria

• The agent's remote_development.network_policy.egress is used to generate the Network Policy Kubernetes resource during reconciliation with the agent.