Add proxy protocol option in the service annotations

[pipo02mix]

We offer the option to setup the proxy protocol but to make it work we need to add the annotation in the Kubernetes service of the IC to tell AWS to create the ELB policy that forwards correctly the requests.

[pipo02mix]

tested on ginger. It creates the correct policy in the ELB to manage proxy protocol

                {
                    "InstancePort": 31974,
                    "PolicyNames": [
                        "k8s-proxyprotocol-enabled"
                    ]
                },
                {
                    "InstancePort": 32564,
                    "PolicyNames": [
                        "k8s-proxyprotocol-enabled"
                    ]
                }
            ],

[sslavic]

Please start 1.2.1 or 1.3.0 changelog.

There's 0.28.0 upstream, would be nice to include it together in next release, if not also modsecurity config support.

[sslavic]

Once changelog is added LGTM