Update artifact_generate|fetch to search for artifact by name__value rather than the definition__name__value.

[FragmentedPacket]

Related to #266 for the InfrahubNodeSync methods.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@           Coverage Diff           @@
##           stable     #284   +/-   ##
=======================================
  Coverage   70.33%   70.33%           
=======================================
  Files          81       81           
  Lines        7505     7505           
  Branches     1463     1463           
=======================================
  Hits         5279     5279           
  Misses       1845     1845           
  Partials      381      381           

Flag	Coverage Δ
integration-tests	22.43% <0.00%> (ø)
python-3.10	45.50% <100.00%> (ø)
python-3.11	45.50% <100.00%> (ø)
python-3.12	45.50% <100.00%> (ø)
python-3.9	44.32% <100.00%> (ø)
python-filler-3.12	23.99% <0.00%> (ø)

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Files with missing lines	Coverage Δ
infrahub_sdk/node.py	77.58% <100.00%> (ø)