🐛 [BUG] Fix SchemaRandonneeParser url update (refs #4022)

[justinefricou]

Description

• Fix: a Trek's URL being duplicated during a new import when the new Trek's description was null or the same as the old description
• Add: a static method for SchemaRandonneeParser allowing other classes to easily find a Trek's URL it added into its description
• Interfaces d'import/export de données selon le standard Data Gouv #4022

Related Issue

Checklist

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[cypress]

Geotrek-admin    Run #10345

Run Properties:   Passed #10345  •  d4618665ed ℹ️: Merge 8fd0b0130c7b6c14303965250c7482b0bbbc21bc into e6096d7e1012bc16c9ce1e9542b4...

Project	Geotrek-admin
Branch Review	refs/pull/4369/merge
Run status	Passed #10345
Run duration	02m 06s
Commit	d4618665ed ℹ️: Merge 8fd0b0130c7b6c14303965250c7482b0bbbc21bc into e6096d7e1012bc16c9ce1e9542b4...
Committer	Justine Fricou
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---

Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	22
View all changes introduced in this branch ↗︎

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.45%. Comparing base (b89ae96) to head (8fd0b01).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4369   +/-   ##
=======================================
  Coverage   98.45%   98.45%           
=======================================
  Files         267      267           
  Lines       21104    21114   +10     
=======================================
+ Hits        20778    20788   +10     
  Misses        326      326           

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