Add support for GPU monitoring

[gjulianm]

What does this PR do?

A brief description of the change being made with this pull request.

Motivation

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Additional Notes

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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

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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

Attention: Patch coverage is 5.76923% with 98 lines in your changes missing coverage. Please review.

Project coverage is 48.72%. Comparing base (efaa4e9) to head (6777208).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...nal/controller/datadogagent/feature/gpu/feature.go	0.00%	98 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1601      +/-   ##
==========================================
- Coverage   48.94%   48.72%   -0.22%     
==========================================
  Files         227      228       +1     
  Lines       20635    20739     +104     
==========================================
+ Hits        10100    10106       +6     
- Misses      10010    10108      +98     
  Partials      525      525              

Flag	Coverage Δ
unittests	48.72% <5.76%> (-0.22%)	⬇️

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

Files with missing lines	Coverage Δ
api/datadoghq/v2alpha1/datadogagent_default.go	91.24% <100.00%> (+0.14%)	⬆️
api/datadoghq/v2alpha1/datadogagent_types.go	100.00% <ø> (ø)
...nal/controller/datadogagent/feature/gpu/feature.go	0.00% <0.00%> (ø)

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