[receiver/awscontainerinsightreceiver] Add option for adding container name as a metric label

[sky333999]

Description: Add option for adding container name as a metric label. Currently, the container name tag/label is copied over to the kubernetes blob and there is no way to retain it as a label.
Example:

{
  "AutoScalingGroupName": "eks-cw1-ng-5ec244c0-bedf-d668-e90c-18064cc7c293",
  "ClusterName": "cw_gpu",
  "InstanceId": "i-0e1104896e4b76eb8",
  "InstanceType": "t3.small",
  "Namespace": "kube-system",
  "NodeName": "ip-192-168-228-23.ec2.internal",
  "PodName": "kube-proxy",
  "Sources": [
    "cadvisor",
    "pod",
    "calculated"
  ],
  "Timestamp": "1682460806199",
  "Type": "Container",
  "Version": "0",
  "container_cpu_request": 100,
  "container_cpu_usage_system": 0.2375214653312615,
  "container_cpu_usage_total": 0.44476191624426764,
  "container_cpu_usage_user": 0.1357265516178637,
  "container_cpu_utilization": 0.022238095812213383,
  "container_last_termination_reason": "Unknown",
  "container_memory_cache": 40144896,
  "container_memory_failcnt": 0,
  "container_memory_hierarchical_pgfault": 21.946983396608566,
  "container_memory_hierarchical_pgmajfault": 0,
  "container_memory_mapped_file": 29736960,
  "container_memory_max_usage": 52666368,
  "container_memory_pgfault": 21.946983396608566,
  "container_memory_pgmajfault": 0,
  "container_memory_rss": 9596928,
  "container_memory_swap": 0,
  "container_memory_usage": 50728960,
  "container_memory_utilization": 0.9148512534571693,
  "container_memory_working_set": 18575360,
  "container_status": "Running",
  "kubernetes": {
    "container_name": "kube-proxy",
    "containerd": {
      "container_id": "4837b6e1a389cc04ee5e1352f8b855414c98edbba36c8141e4ec13a20545e8a5"
    },
    "host": "ip-192-168-228-23.ec2.internal",
    "labels": {
      "controller-revision-hash": "5795b88684",
      "k8s-app": "kube-proxy",
      "pod-template-generation": "2"
    },
    "namespace_name": "kube-system",
    "pod_id": "8fd74bbf-be8c-4727-a8ec-d5c25f051b9a",
    "pod_name": "kube-proxy-ph9fp",
    "pod_owners": [
      {
        "owner_kind": "DaemonSet",
        "owner_name": "kube-proxy"
      }
    ]
  }
}

With this change, when set to true, the ContainerName should be retained as a label in the log event.
Example:

{
  "AutoScalingGroupName": "eks-cw1-ng-5ec244c0-bedf-d668-e90c-18064cc7c293",
  "ClusterName": "cw_gpu",
  "ContainerName": "kube-proxy", 
  "InstanceId": "i-0e1104896e4b76eb8",
  "InstanceType": "t3.small",
  "Namespace": "kube-system",
  "NodeName": "ip-192-168-228-23.ec2.internal",
  "PodName": "kube-proxy",
  "Sources": [
    "cadvisor",
    "pod",
    "calculated"
  ],
  "Timestamp": "1682460806199",
  "Type": "Container",
  "Version": "0",
  "container_cpu_request": 100,
  "container_cpu_usage_system": 0.2375214653312615,
  "container_cpu_usage_total": 0.44476191624426764,
  "container_cpu_usage_user": 0.1357265516178637,
  "container_cpu_utilization": 0.022238095812213383,
  "container_last_termination_reason": "Unknown",
  "container_memory_cache": 40144896,
  "container_memory_failcnt": 0,
  "container_memory_hierarchical_pgfault": 21.946983396608566,
  "container_memory_hierarchical_pgmajfault": 0,
  "container_memory_mapped_file": 29736960,
  "container_memory_max_usage": 52666368,
  "container_memory_pgfault": 21.946983396608566,
  "container_memory_pgmajfault": 0,
  "container_memory_rss": 9596928,
  "container_memory_swap": 0,
  "container_memory_usage": 50728960,
  "container_memory_utilization": 0.9148512534571693,
  "container_memory_working_set": 18575360,
  "container_status": "Running",
  "kubernetes": {
    "container_name": "kube-proxy",
    "containerd": {
      "container_id": "4837b6e1a389cc04ee5e1352f8b855414c98edbba36c8141e4ec13a20545e8a5"
    },
    "host": "ip-192-168-228-23.ec2.internal",
    "labels": {
      "controller-revision-hash": "5795b88684",
      "k8s-app": "kube-proxy",
      "pod-template-generation": "2"
    },
    "namespace_name": "kube-system",
    "pod_id": "8fd74bbf-be8c-4727-a8ec-d5c25f051b9a",
    "pod_name": "kube-proxy-ph9fp",
    "pod_owners": [
      {
        "owner_kind": "DaemonSet",
        "owner_name": "kube-proxy"
      }
    ]
  }
}

Testing:

• Updated unit tests that verify the existence and absence of the ContainerName tag for both cases.
• Manual integration test with CWA EKS CI in progress.

Documentation: Updated README.md