Enabling APM by default (#1006)

[levan-m]

What does this PR do?

Breaking up #981 into 2 parts.

Motivation

Unblock Release of 1.3.0.

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

Merging #1011 (7e7778b) into v1.3 (f364f53) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             v1.3    #1011      +/-   ##
==========================================
+ Coverage   57.13%   57.14%   +0.01%     
==========================================
  Files         164      164              
  Lines       19584    19589       +5     
==========================================
+ Hits        11190    11195       +5     
  Misses       7741     7741              
  Partials      653      653              

Flag	Coverage Δ
unittests	57.14% <100.00%> (+0.01%)	⬆️

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

Files	Coverage Δ
apis/datadoghq/v1alpha1/datadogagent_validation.go	0.00% <ø> (ø)
apis/datadoghq/v1alpha1/datadogmonitor_types.go	100.00% <ø> (ø)
...is/datadoghq/v1alpha1/datadogmonitor_validation.go	100.00% <ø> (ø)
apis/datadoghq/v1alpha1/datadogslo_types.go	100.00% <ø> (ø)
apis/datadoghq/v1alpha1/datadogslo_validation.go	100.00% <ø> (ø)
apis/datadoghq/v2alpha1/datadogagent_default.go	88.26% <100.00%> (+0.33%)	⬆️
apis/datadoghq/v2alpha1/datadogagent_types.go	100.00% <ø> (ø)
cmd/kubectl-datadog/agent/check/check.go	9.22% <ø> (ø)
cmd/kubectl-datadog/agent/upgrade/upgrade.go	16.79% <ø> (ø)
...md/kubectl-datadog/clusteragent/upgrade/upgrade.go	7.93% <ø> (ø)
... and 24 more

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