import: factorize bounding box

[bouttier]

No description provided.

[bouttier]

Testé pour la synthèse & occhab, avant & après import

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 12 lines in your changes missing coverage. Please review.

Project coverage is 83.50%. Comparing base (86d3620) to head (667a39f).
Report is 1 commits behind head on feat/import.

Files with missing lines	Patch %	Lines
backend/geonature/core/imports/utils.py	56.00%	11 Missing ⚠️
...occhab/backend/gn_module_occhab/imports/actions.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           feat/import    #3184      +/-   ##
===============================================
+ Coverage        83.36%   83.50%   +0.14%     
===============================================
  Files              121      121              
  Lines             9553     9538      -15     
===============================================
+ Hits              7964     7965       +1     
+ Misses            1589     1573      -16     

Flag	Coverage Δ
pytest	83.50% <57.14%> (+0.14%)	⬆️

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