Improve APIDAE Trek parser output with entities external IDs

[marcantoinedupre]

La rapport d'import ressemble maintenant à :

71/71 lignes importées.
64 enregistrements mis à jour.
5 enregistrements non modifiés.
2 avertissements :

# APIDAE Trek #320507 at line 19:
- Le champ required 'multimedias' est manquant,
# APIDAE Trek #4787235 at line 44:
- The trek from APIDAE has no attachment with the type "PLAN",

Précedemment seul le numéro de ligne durant l'import était visible.

[cypress]

Passing run #5640 ↗︎

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Details:

Merge 9977e73 into d871624...
Project: Geotrek-admin	Commit: 4c5dd68ecf ℹ️
Status: Passed	Duration: 03:37 💡
Started: Jan 31, 2023 1:47 PM	Ended: Jan 31, 2023 1:50 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Base: 98.26% // Head: 98.26% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (52f598e) compared to base (480ae2d).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 52f598e differs from pull request most recent head 9977e73. Consider uploading reports for the commit 9977e73 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3429   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files         291      291           
  Lines       20870    20873    +3     
=======================================
+ Hits        20507    20510    +3     
  Misses        363      363           

Impacted Files	Coverage Δ
geotrek/trekking/parsers.py	99.83% <100.00%> (+<0.01%)	⬆️
geotrek/core/views.py	99.33% <0.00%> (-0.01%)	⬇️

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[numahell]

Nice PR, just need translation maybe