Add 'source', 'portal' and 'structure' to Cirkwi trek exports

[Chatewgne]

<tracking_information>
  <portals>
    <portal id="1" nom="Portail 1"/>
    <portal id="2" nom="Portail 2"/>
  </portals>
  <sources>
    <source id="2" nom="Autre source"/>
    <source id="1" nom="IGN"/>
  </sources>
  <structure id="1" nom="CD04"/>
</tracking_information>

dans le bloc "informations" de chaque langue on ajoute les labels:

<information_complementaire>
    <titre>Coeur de parc</titre>
    <description>Itinéraire au coeur du parc</description>
</information_complementaire>

[cypress[bot]]

---

Test summary

22 • 0 • 0 • 0

---

Run details

Project	Geotrek-admin
Status	Passed
Commit	0deb759d34 ℹ️
Started	Sep 2, 2022 8:06 AM
Ended	Sep 2, 2022 8:10 AM
Duration	03:26 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 94

View run in Cypress Dashboard ➡️

---

This comment has been generated by cypress-bot as a result of this project's GitHub integration settings. You can manage this integration in this project's settings in the Cypress Dashboard

[codecov[bot]]

Codecov Report

Merging #3221 (1920f2c) into master (10a82c6) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #3221   +/-   ##
=======================================
  Coverage   97.94%   97.94%           
=======================================
  Files         273      273           
  Lines       19229    19257   +28     
=======================================
+ Hits        18833    18861   +28     
  Misses        396      396           

Impacted Files	Coverage Δ
geotrek/cirkwi/serializers.py	91.75% <100.00%> (+1.49%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.