[AGTMETRICS-233] Add support for OpenTelemetry Agent and Agent Data Plane to DAPs. (v1.15.0 backport)

[tobz]

What does this PR do?

Backport of #1951.

Motivation

No intention of merging this PR, but wanted to submit it as a PR to have kind of a paper trail that we're building a custom image from it that will be used temporarily on a few clusters while we wait for v1.16.0.

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

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

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 50.37%. Comparing base (6c847c2) to head (d2c67f0).

Additional details and impacted files

@@                  Coverage Diff                   @@
##           tobz/v1.15.0-backport    #1954   +/-   ##
======================================================
  Coverage                  50.36%   50.37%           
======================================================
  Files                        228      228           
  Lines                      21774    21776    +2     
======================================================
+ Hits                       10967    10969    +2     
  Misses                     10259    10259           
  Partials                     548      548           

Flag	Coverage Δ
unittests	50.37% <100.00%> (+<0.01%)	:arrow_up:

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

Files with missing lines	Coverage Δ
pkg/agentprofile/agent_profile.go	71.87% <100.00%> (+0.16%)	:arrow_up:

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