DB: Add egress ip rules fields

MR: Add egress ip options in remote development age... (!135497 - merged)

Description

Add DB fields to make egress IP rules configurable

Acceptance Criteria

• New DB fields added network_policy_egress to remote_development_agent_configs table.

• This field is of jsonb type.

• The acceptable json schema for network_policy_egress.allow is a string and network_policy_egress.except is a list of strings. Each element of the network_policy_egress.except and network_policy_egress.allow is further validated to be a CIDR.

• The default value for network_policy_egress is

  {
    allow: "0.0.0.0/0",
    except: [
      - "10.0.0.0/8",
      - "172.16.0.0/12",
      - "192.168.0.0/16"
    ]
  }