Fix defaultOverride status update

[clamoriniere]

What does this PR do?

Compare the same golang struct to detect defaultOverride update.

Motivation

Fix untimely status update.

Additional Notes

N/A

Describe your test plan

By running the operator, you should see less update conflict.

[github-actions]

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[codecov-commenter]

Codecov Report

Merging #345 (9c5d17b) into main (1ded384) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #345   +/-   ##
=======================================
  Coverage   63.98%   63.98%           
=======================================
  Files          61       61           
  Lines        6694     6694           
=======================================
  Hits         4283     4283           
  Misses       2104     2104           
  Partials      307      307           

Flag	Coverage Δ
unittests	63.98% <100.00%> (ø)

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

Impacted Files	Coverage Δ
controllers/datadogagent/controller.go	51.80% <100.00%> (ø)

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