Add validation checks for geojson asset

[susilnem]

Addresses

• validation checks for the geojson asset file

Changes

• Add new validation check for geojson
• Update validation check for geojson asset file in serializer

This PR doesn't introduce any:

• temporary files, auto-generated files or secret keys
• n+1 queries
• flake8 issues
• print
• typos
• unwanted comments

This PR contains valid:

• tests
• permission checks (tests here too)
• translations

[codecov]

Codecov Report

❌ Patch coverage is 69.23077% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.67%. Comparing base (90f7bdd) to head (deec09b).
⚠️ Report is 3 commits behind head on develop.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
utils/common.py	60.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #84      +/-   ##
===========================================
- Coverage    81.70%   81.67%   -0.03%     
===========================================
  Files          145      145              
  Lines         6028     6040      +12     
  Branches       521      523       +2     
===========================================
+ Hits          4925     4933       +8     
- Misses         928      931       +3     
- Partials       175      176       +1     

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