Add ability to initialize a Check with a client

[ogenstad]

This is to consolidate how we load modules and will be used as a preparation for #81.

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/checks.py	80.00%	1 Missing and 1 partial ⚠️

@@             Coverage Diff              @@
##           develop     #115       +/-   ##
============================================
+ Coverage    43.26%   64.29%   +21.03%     
============================================
  Files           74       74               
  Lines         6856     6864        +8     
  Branches      1353     1358        +5     
============================================
+ Hits          2966     4413     +1447     
+ Misses        3622     2099     -1523     
- Partials       268      352       +84     

Flag	Coverage Δ
python-3.10	43.24% <30.00%> (-0.03%)	⬇️
python-3.11	43.24% <30.00%> (-0.03%)	⬇️
python-3.12	43.24% <30.00%> (-0.03%)	⬇️
python-3.9	43.18% <30.00%> (-0.03%)	⬇️
python-filler-3.12	23.92% <50.00%> (?)

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Files with missing lines	Coverage Δ
infrahub_sdk/checks.py	63.39% <80.00%> (+35.50%)	⬆️

... and 39 files with indirect coverage changes