[frontend/backend] Handle app:validation_mode in LaunchImportDialog (#11603)

[delemaf]

Proposed changes

• We want to disable the validation_mode selection when app:validation_mode is specified in config file

Related issues

• The validation mode chosen during file import is not taken into account #11603

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.13%. Comparing base (fe38883) to head (0bcafeb).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12565      +/-   ##
==========================================
- Coverage   65.73%   65.13%   -0.61%     
==========================================
  Files         745      752       +7     
  Lines       75314    76708    +1394     
  Branches     8530     8608      +78     
==========================================
+ Hits        49506    49960     +454     
- Misses      25808    26748     +940     

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[JeremyCloarec]

small typo, it's set and not setted

[JeremyCloarec]

I think there is a misunderstanding from the initial reported issue. The app:validation_mode is only relevant for the import csv connector, and not relevant for the other import file connectors: we would need to know the CONNECTOR_VALIDATE_BEFORE_IMPORT configuration of the connector.
We'll need to sync on this to know how we want to tackle the issue