Add shared dependencies

[khewonc]

What does this PR do?

Add shared dependencies. Dependencies that can be configured by both DDA and DDAIs and are 1 per cluster are "shared" dependencies since we can't create 1 per DDA/DDAI. These are things like local service for APM/DSD and eventually seccomp profile configmap

Motivation

https://datadoghq.atlassian.net/browse/CONTP-1762

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

Create a DDA and DAP with hostports set to different values:

# dda
    features:
      apm:
        enabled: true
        hostPortConfig:
          enabled: true
          hostPort: 8126

# dap
    features:
      apm:
        enabled: true
        hostPortConfig:
          enabled: true
          hostPort: 8127

The DDA value 8126 should be in the resulting service (kubectl get svc <local-agent-svc-name>). In the operator logs, you will see this warning: {"level":"INFO","ts":"2026-06-22T21:52:27.009Z","msg":"Ignoring conflicting DDA shared Service port","DatadogAgent":{"name":"datadog-agent","namespace":"default"},"namespace":"default","name":"datadog-agent","reconcileID":"f32796df-aed9-4848-8603-fcd6e671a0ad","datadogagentinternal_namespace":"default","datadogagentinternal_name":"dap-test","reason":"apm DDA shared dependencies failed: unable to add ports to Service datadog-agent-agent: port \"traceport\" conflicts with existing port: service port conflict"}

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)

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🛑 Gate Violations

🎯 1 Code Coverage issue detected

A Patch coverage percentage gate may be blocking this PR.

• Patch coverage: 29.67% (threshold: 80.00%)

ℹ️ Info

🎯 Code Coverage (details)
• Patch Coverage: 29.67%
• Overall Coverage: 44.18% (-0.08%)

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