[backport] PDB v1beta1 support fix

[tbavelier]

What does this PR do?

Cherry-picks #1580

Motivation

What inspired you to submit this pull request?

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

Attention: Patch coverage is 24.59016% with 46 lines in your changes missing coverage. Please review.

Project coverage is 48.57%. Comparing base (e3bd1a3) to head (2da2522).

Files with missing lines	Patch %	Lines
...oller/datadogagent/component/clusteragent/utils.go	12.50%	13 Missing and 1 partial ⚠️
...adogagent/component/clusterchecksrunner/default.go	12.50%	13 Missing and 1 partial ⚠️
pkg/kubernetes/platforminfo.go	33.33%	10 Missing ⚠️
pkg/equality/equality.go	0.00%	6 Missing ⚠️
pkg/kubernetes/objects.go	0.00%	1 Missing ⚠️
pkg/kubernetes/objectslist.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            v1.11    #1582      +/-   ##
==========================================
- Coverage   48.66%   48.57%   -0.09%     
==========================================
  Files         226      226              
  Lines       20363    20413      +50     
==========================================
+ Hits         9909     9915       +6     
- Misses       9937     9979      +42     
- Partials      517      519       +2     

Flag	Coverage Δ
unittests	48.57% <24.59%> (-0.09%)	⬇️

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

Files with missing lines	Coverage Δ
...l/controller/datadogagent/override/dependencies.go	56.98% <100.00%> (+0.94%)	⬆️
.../controller/datadogagent/testutils/client_utils.go	100.00% <ø> (ø)
internal/controller/datadogagent_controller.go	67.59% <100.00%> (+0.30%)	⬆️
pkg/kubernetes/objects.go	0.00% <0.00%> (ø)
pkg/kubernetes/objectslist.go	0.00% <0.00%> (ø)
pkg/equality/equality.go	7.05% <0.00%> (-0.29%)	⬇️
pkg/kubernetes/platforminfo.go	64.28% <33.33%> (-8.45%)	⬇️
...oller/datadogagent/component/clusteragent/utils.go	22.50% <12.50%> (-5.86%)	⬇️
...adogagent/component/clusterchecksrunner/default.go	9.58% <12.50%> (-1.10%)	⬇️

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