fix: flow translation post processing

[scolladon]

Explain your changes

---

Flow translation post processing was broken because it was not passing the right config variable to the scanExtension methods
This PR fix this issue and add more precise assertion to the related unit tests

[codeclimate]

Code Climate has analyzed commit 78d1077 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (78d1077) compared to base (0855dcc).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #487   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           31        31           
  Lines          816       816           
=========================================
  Hits           816       816           

Impacted Files	Coverage Δ
src/post-processor/flowTranslationProcessor.js	100.00% <ø> (ø)

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[github-actions]

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