chore: Revert "feat: 3585 - upgrade to flutter 3.7 (#3666)"

[monsieurtanuki]

This reverts commit ad46236.

[codecov-commenter]

Codecov Report

Merging #3702 (0c574e9) into develop (f2ede98) will increase coverage by 0.97%.
The diff coverage is 43.47%.

@@             Coverage Diff             @@
##           develop    #3702      +/-   ##
===========================================
+ Coverage     9.34%   10.32%   +0.97%     
===========================================
  Files          272      272              
  Lines        13722    13734      +12     
===========================================
+ Hits          1283     1418     +135     
+ Misses       12439    12316     -123     

Impacted Files	Coverage Δ
...ooth_app/lib/background/background_task_badge.dart	8.33% <0.00%> (-0.76%)	⬇️
...ackages/smooth_app/lib/helpers/network_config.dart	0.00% <0.00%> (ø)
...owledge_panels/knowledge_panel_world_map_card.dart	0.00% <0.00%> (ø)
...oth_app/lib/pages/onboarding/country_selector.dart	0.00% <0.00%> (ø)
...p/lib/pages/product/common/product_query_page.dart	0.00% <0.00%> (ø)
...es/smooth_app/lib/pages/scan/camera_scan_page.dart	0.43% <0.00%> (-0.01%)	⬇️
...ib/pages/preferences/account_deletion_webview.dart	91.30% <90.90%> (+91.30%)	⬆️
...lib/query/paged_to_be_completed_product_query.dart	3.84% <0.00%> (+3.84%)	⬆️
..._app/lib/data_models/user_management_provider.dart	4.87% <0.00%> (+4.87%)	⬆️
... and 12 more

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[stephanegigandet]

Thank you!

[monsieurtanuki]

Thank you @stephanegigandet for the review!
I guess #3642 should probably be reverted too.