Adds experimental 'WorkloadCapture' sidecar featuer

[scottopell]

What does this PR do?

Adds an experimental sidecar container that can inspect and characterize the incoming workloads that the Agent is processing.

Motivation

Additional Notes

Replaces #2253

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

Write there any instructions and details you may have to test your PR.

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

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 95 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.92%. Comparing base (9a933b7) to head (a24dbea).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...r/datadogagent/feature/workloadcapturer/feature.go	0.00%	62 Missing ⚠️
...controller/datadogagent/component/agent/default.go	0.00%	33 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2263      +/-   ##
==========================================
- Coverage   39.10%   37.92%   -1.19%     
==========================================
  Files         254      255       +1     
  Lines       26329    21112    -5217     
==========================================
- Hits        10297     8007    -2290     
+ Misses      15418    12483    -2935     
- Partials      614      622       +8     

Flag	Coverage Δ
unittests	37.92% <0.00%> (-1.19%)	⬇️

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Files with missing lines	Coverage Δ
internal/controller/datadogagent/controller.go	45.45% <ø> (-4.55%)	⬇️
...controller/datadogagent/component/agent/default.go	6.43% <0.00%> (-1.14%)	⬇️
...r/datadogagent/feature/workloadcapturer/feature.go	0.00% <0.00%> (ø)

... and 236 files with indirect coverage changes

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