Implement label and annotation equality checking

[khewonc]

What does this PR do?

Implements checking for differences in annotations and labels for objects.

Motivation

Unable to update service account annotations when qa'ing #1425

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

• Override serviceAccountAnnotations in the DDA

  override:
    nodeAgent:
      serviceAccountAnnotations:
        foo: bar
        one: two
    clusterAgent:
      serviceAccountAnnotations:
        d: ca
        a: c
    clusterChecksRunner:
      serviceAccountAnnotations:
        a: b

• Update serviceAccountAnnotations in the DDA and ensure the annotations are updated in the service accounts

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 ✅

Project coverage is 48.86%. Comparing base (ae4c939) to head (d5207f1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1467      +/-   ##
==========================================
- Coverage   48.94%   48.86%   -0.08%     
==========================================
  Files         223      223              
  Lines       19758    19756       -2     
==========================================
- Hits         9670     9654      -16     
- Misses       9578     9595      +17     
+ Partials      510      507       -3     

Flag	Coverage Δ
unittests	48.86% <100.00%> (-0.08%)	⬇️

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

Files with missing lines	Coverage Δ
pkg/equality/equality.go	2.48% <100.00%> (-9.79%)	⬇️

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[tbavelier]

Just a minor typo on last test