[ADF-5284] Restore original plugin functionality

[pionnegru]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:

What is the current behaviour? (You can also link to an open issue here)
ADF-5284

What is the new behaviour?

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[codecov-io]

Codecov Report

Merging #6348 (1205778) into develop (d36fd9d) will increase coverage by 0.16%.
The diff coverage is 57.14%.

@@             Coverage Diff             @@
##           develop    #6348      +/-   ##
===========================================
+ Coverage    76.29%   76.45%   +0.16%     
===========================================
  Files          867      867              
  Lines        19612    19615       +3     
  Branches      3891     3892       +1     
===========================================
+ Hits         14962    14997      +35     
+ Misses        3483     3441      -42     
- Partials      1167     1177      +10     

Impacted Files	Coverage Δ
...sions/src/lib/services/extension-loader.service.ts	53.57% <40.00%> (+42.25%)	⬆️
...b/extensions/src/lib/services/extension.service.ts	82.75% <100.00%> (ø)
lib/core/services/upload.service.ts	88.82% <0.00%> (+3.35%)	⬆️
lib/extensions/src/lib/config/extension-utils.ts	8.47% <0.00%> (+8.47%)	⬆️

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[eromano]

/rebase