Replace static joins with f-strings

[ogenstad]

Activates FLY rules for ruff.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/pytest_plugin/items/graphql_query.py	0.00%	1 Missing ⚠️
...frahub_sdk/pytest_plugin/items/python_transform.py	0.00%	1 Missing ⚠️

@@           Coverage Diff            @@
##           develop     #242   +/-   ##
========================================
  Coverage    70.28%   70.28%           
========================================
  Files           82       82           
  Lines         7462     7462           
  Branches      1385     1385           
========================================
  Hits          5245     5245           
  Misses        1842     1842           
  Partials       375      375           

Flag	Coverage Δ
integration-tests	22.46% <0.00%> (ø)
python-3.10	45.48% <33.33%> (ø)
python-3.11	45.48% <33.33%> (?)
python-3.12	45.48% <33.33%> (?)
python-3.13	45.48% <33.33%> (ø)
python-3.9	45.48% <33.33%> (?)
python-filler-3.12	24.08% <33.33%> (ø)

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Files with missing lines	Coverage Δ
...frahub_sdk/pytest_plugin/items/jinja2_transform.py	54.79% <100.00%> (ø)
infrahub_sdk/pytest_plugin/items/graphql_query.py	48.48% <0.00%> (ø)
...frahub_sdk/pytest_plugin/items/python_transform.py	39.21% <0.00%> (ø)