[aws-cloudwatch-metrics] Support all options in cwagentconfig.json

[donovanmuller]

As per the docs, the cwagentconfig.json supports options such as logs.endpoint_override, agent and metrics:

{
    "agent": {
        "region": "us-east-1"
    },
    "logs": {
        "metrics_collected": {
            "kubernetes": {
                "cluster_name": "MyCluster",
                "metrics_collection_interval": 60
            }
        },
        "force_flush_interval": 5,
        "endpoint_override": "logs.us-east-1.amazonaws.com"
    },
    "metrics": {
        "metrics_collected": {
            "statsd": {
                "service_address": ":8125"
            }
        }
    }
}

These options are not currently supported by the chart but should be.