align environment variables between the SDK and infrahubctl

[wvandeun]

infrahuctl was using other environment variables to achieve the same goal as other envrionment variables that we leverage in the SDK. This PR aligns the usage of them.

INFRAHUBCTL_TIMEOUT > INFRAHUB_TIMEOUT
INFRAHUBCTL_CONCURRENT_EXECUTION > INFRAHUBCTL_MAX_CONCURRENT_EXECUTION

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ There is a different number of reports uploaded between BASE (5f73796) and HEAD (9abe527). Click for more details.

HEAD has 5 uploads less than BASE

Flag	BASE (5f73796)	HEAD (9abe527)
python-3.12	1	0
python-3.9	1	0
python-3.10	1	0
python-filler-3.12	1	0
python-3.11	1	0

@@             Coverage Diff              @@
##           develop     #243       +/-   ##
============================================
- Coverage    70.28%   48.85%   -21.44%     
============================================
  Files           82       82               
  Lines         7462     7463        +1     
  Branches      1385     1383        -2     
============================================
- Hits          5245     3646     -1599     
- Misses        1842     3530     +1688     
+ Partials       375      287       -88     

Flag	Coverage Δ
integration-tests	22.45% <0.00%> (-0.01%)	⬇️
python-3.10	?
python-3.11	?
python-3.12	?
python-3.13	45.49% <100.00%> (+<0.01%)	⬆️
python-3.9	?
python-filler-3.12	?

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Files with missing lines	Coverage Δ
infrahub_sdk/ctl/cli_commands.py	58.82% <ø> (ø)
infrahub_sdk/ctl/exporter.py	50.00% <ø> (ø)
infrahub_sdk/ctl/importer.py	57.14% <100.00%> (+2.14%)	⬆️

... and 43 files with indirect coverage changes