Refactor extraction of ingress pod details

[aledbf]

What this PR does / why we need it:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

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• OWNERS [aledbf]

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[codecov-io]

Codecov Report

Merging #6480 (edb9002) into master (ca7db0e) will decrease coverage by 0.06%.
The diff coverage is 44.85%.

@@            Coverage Diff             @@
##           master    #6480      +/-   ##
==========================================
- Coverage   55.81%   55.75%   -0.07%     
==========================================
  Files          89       91       +2     
  Lines        6358     6417      +59     
==========================================
+ Hits         3549     3578      +29     
- Misses       2369     2398      +29     
- Partials      440      441       +1     

Impacted Files	Coverage Δ
cmd/nginx/main.go	4.23% <0.00%> (-0.07%)	⬇️
internal/ingress/controller/nginx.go	28.91% <ø> (ø)
internal/ingress/controller/status.go	0.00% <0.00%> (ø)
internal/k8s/zz_generated.deepcopy.go	0.00% <0.00%> (ø)
internal/ingress/controller/location.go	17.64% <17.64%> (ø)
...ternal/ingress/annotations/sessionaffinity/main.go	57.77% <28.57%> (ø)
internal/ingress/annotations/annotations.go	80.88% <33.33%> (ø)
internal/ingress/controller/controller.go	46.99% <33.33%> (+0.06%)	⬆️
internal/ingress/controller/store/store.go	58.94% <41.66%> (-0.11%)	⬇️
internal/ingress/controller/util.go	55.26% <50.00%> (-2.81%)	⬇️
... and 10 more

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[aledbf]

/hold