fix: 4595 - no fast track if nutriscore is not applicable

[monsieurtanuki]

What

• We used to consider a product as incomplete in some cases, and displayed a "fast track" button in order to complete it.
• But there are categories of products (e.g. alcool, coffee) that would always be considered as incomplete under those rules.
• I've just added a test about the current nutriscore (computed by the server): if it's "not applicable", then we don't consider the product as incomplete and we don't display the fast-track button.

Screenshot

before	after

Part of

• Refine FastTrack behavior on edge cases #4595

[teolemon]

@monsieurtanuki we have a parallel case for Eco-Score and drinks.
https://world.openfoodfacts.org/product/5449000206770/eau-de-table-ciel

[teolemon]

Also, it would be very intesting to know how many times we show products with ecoscore not applicable, or nutriscore not applicable in matomo

[monsieurtanuki]

Also, it would be very intesting to know how many times we show products with ecoscore not applicable, or nutriscore not applicable in matomo

I've just added ecoscore and matomo.

[codecov-commenter]

Codecov Report

Merging #4599 (0adc984) into develop (3894656) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop    #4599      +/-   ##
===========================================
- Coverage    10.27%   10.26%   -0.02%     
===========================================
  Files          297      297              
  Lines        15487    15506      +19     
===========================================
  Hits          1591     1591              
- Misses       13896    13915      +19     

Files Changed	Coverage Δ
...kages/smooth_app/lib/helpers/analytics_helper.dart	6.25% <ø> (ø)
...app/lib/pages/product/product_incomplete_card.dart	0.00% <0.00%> (ø)

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