Standardized truthy args in routes

[davidwaroquiers]

Added is_truthy_query_value helper function.
Using helper in routes.
Tests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.56%. Comparing base (ddb057c) to head (6bedfad).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2208      +/-   ##
==========================================
+ Coverage   82.48%   82.56%   +0.07%     
==========================================
  Files          91       91              
  Lines        8782     8775       -7     
==========================================
+ Hits         7244     7245       +1     
+ Misses       1538     1530       -8     

Files with missing lines	Coverage Δ
pydatalab/src/pydatalab/permissions.py	92.94% <100.00%> (+0.04%)	⬆️
pydatalab/src/pydatalab/routes/v0_1/auth.py	82.94% <100.00%> (+0.03%)	⬆️
pydatalab/src/pydatalab/routes/v0_1/graphs.py	98.05% <100.00%> (+0.01%)	⬆️
pydatalab/src/pydatalab/routes/v0_1/groups.py	96.15% <100.00%> (+0.15%)	⬆️
pydatalab/src/pydatalab/routes/v0_1/items.py	87.23% <100.00%> (+0.41%)	⬆️
pydatalab/src/pydatalab/routes/v0_1/remotes.py	95.00% <100.00%> (+7.96%)	⬆️
pydatalab/src/pydatalab/utils/__init__.py	90.62% <100.00%> (+0.62%)	⬆️

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