Add apm non local traffic env var to local service

[khewonc]

What does this PR do?

Add DD_APM_NON_LOCAL_TRAFFIC env var to local service. Ensures the config is there even if the agent image's default datadog.yaml from k8s is overridden with a custom file

Motivation

https://datadoghq.atlassian.net/browse/CONTP-1756

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

• Using a DDA without APM hostport enabled on k8s 1.22+, check that the DD_APM_NON_LOCAL_TRAFFIC=true env var is in the trace agent

    features:
      apm:
        enabled: true
        hostPortConfig:
          enabled: false

• Add a custom datadog.yaml file and check that the DD_APM_NON_LOCAL_TRAFFIC=true env var is in the trace agent

  override:
    nodeAgent:
      customConfigurations:
        datadog.yaml:
          configData: |
            log_level: debug

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)