Add some integration tests in test_node and test_infrahub_client

[dgarros]

Related to #187

Still exploring what is the best way to manage schemas and related data for testing

[codecov]

Codecov Report

Attention: Patch coverage is 96.26866% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/testing/schemas/car_person.py	95.00%	3 Missing ⚠️
infrahub_sdk/testing/schemas/animal.py	97.05%	1 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##           stable     #211      +/-   ##
==========================================
+ Coverage   66.33%   67.79%   +1.46%     
==========================================
  Files          81       82       +1     
  Lines        7259     7360     +101     
  Branches     1409     1438      +29     
==========================================
+ Hits         4815     4990     +175     
+ Misses       2059     1993      -66     
+ Partials      385      377       -8     

Flag	Coverage Δ
integration-tests	12.54% <94.02%> (+5.33%)	⬆️
python-3.10	43.12% <1.49%> (-0.58%)	⬇️
python-3.11	43.12% <1.49%> (-0.58%)	⬇️
python-3.12	43.12% <1.49%> (-0.58%)	⬇️
python-3.13	43.12% <1.49%> (-0.58%)	⬇️
python-3.9	41.56% <1.49%> (-1.24%)	⬇️
python-filler-3.12	24.10% <2.23%> (-0.35%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
infrahub_sdk/branch.py	54.92% <100.00%> (+9.21%)	⬆️
infrahub_sdk/schema/main.py	83.40% <100.00%> (+0.06%)	⬆️
infrahub_sdk/testing/schemas/animal.py	97.05% <97.05%> (ø)
infrahub_sdk/testing/schemas/car_person.py	78.64% <95.00%> (+5.30%)	⬆️

... and 4 files with indirect coverage changes