Change ADP default health port to 5400

[webern]

What does this PR do?

Set DD_DATA_PLANE_API_LISTEN_ADDRESS explicitly on the ADP container so the operator controls the listen port, keeping probes in sync regardless of ADP's compiled-in default.

Motivation

We needed to change ADP's default listen port to avoid potential conflicts with existing Agent installs.

Ref: DataDog/saluki#1652

Minimum Agent Versions

N/A

Describe your test plan

I believe the e2e testing is sufficient. In particular, test/e2e/manifests/dogstatsd/datadog-agent-dsd-udp-adp.yaml

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)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.91%. Comparing base (7f86fa0) to head (b61c5bf).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3014   +/-   ##
=======================================
  Coverage   40.90%   40.91%           
=======================================
  Files         333      333           
  Lines       28327    28331    +4     
=======================================
+ Hits        11588    11592    +4     
  Misses      15960    15960           
  Partials      779      779           

Flag	Coverage Δ
unittests	40.91% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ntroller/datadogagent/feature/dataplane/feature.go	82.14% <100.00%> (+1.37%)	⬆️

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