🌱 Refactor applier to use HelmChartLoader

[perdasilva]

Description

Refactor how helm applier gets chart by adding an extra layer of abstraction to deal with multiple bundle/fs formats (i.e. helm and registry+v1) and move feature check to main.go

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[codecov]

Codecov Report

Attention: Patch coverage is 73.97260% with 19 lines in your changes missing coverage. Please review.

Project coverage is 73.38%. Comparing base (134f887) to head (d14da9c).

Files with missing lines	Patch %	Lines
internal/operator-controller/applier/loader.go	34.48%	16 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2089      +/-   ##
==========================================
- Coverage   73.52%   73.38%   -0.15%     
==========================================
  Files          78       79       +1     
  Lines        7241     7281      +40     
==========================================
+ Hits         5324     5343      +19     
- Misses       1566     1582      +16     
- Partials      351      356       +5     

Flag	Coverage Δ
e2e	44.06% <46.57%> (+0.15%)	⬆️
experimental-e2e	50.19% <50.68%> (-0.05%)	⬇️
unit	58.42% <38.35%> (-0.33%)	⬇️

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