Add option for Container Insights with enhanced observability

**Is your feature request related to a problem?**
There is no way to enable enhanced observability for container insights, so some dashboard don't have data to display

**Is your feature request related to a specific Helm chart, if yes mention name of the chart?**
Yes, aws-cloudwatch-metrics

**Describe the solution you'd like**
Add an option to define the following in the config map:

"enhanced_container_insights": true

Eg.
cwagentconfig.json: |
{
"logs": {
"metrics_collected": {
"kubernetes": {
"cluster_name": "{{ .Values.clusterName }}",
"enhanced_container_insights": {{ .Values.enhanced_observability_enabled }},
"metrics_collection_interval": 60
}
},

Start with the aws-cloudwatch-metrics Helm chart and its ConfigMap that defines cwagentconfig.json; trace how chart values are inserted into the Kubernetes metrics configuration. The issue's example shows the desired enhanced_container_insights setting; render the chart with the option enabled and verify that the generated config map contains it.

Written by the indexing model from the issue text.