Various housekeeping tasks

[dgarros]

• Update pytest-httpx and set all responses as reusable (required by the latest version of pytest-httpx
• Add a fixture to always reset some environment variables before running tests
• Fix type for metadata in InfrahubFileData

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@           Coverage Diff            @@
##           develop     #354   +/-   ##
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  Coverage    72.45%   72.45%           
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  Files           91       91           
  Lines         8180     8180           
  Branches      1576     1576           
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  Hits          5927     5927           
  Misses        1841     1841           
  Partials       412      412           

Flag	Coverage Δ
integration-tests	22.33% <0.00%> (ø)
python-3.10	46.51% <100.00%> (-0.03%)	⬇️
python-3.11	46.51% <100.00%> (ø)
python-3.12	46.51% <100.00%> (-0.03%)	⬇️
python-3.13	46.54% <100.00%> (ø)
python-3.9	44.88% <100.00%> (ø)
python-filler-3.12	25.09% <0.00%> (ø)

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Files with missing lines	Coverage Δ
infrahub_sdk/yaml.py	78.48% <100.00%> (ø)

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[ogenstad]

Given that this will run until the session has completed I don't know if there's a point of resetting the environment variables after everything has completed. There should be nothing left that would use them at that point.