add option to opt out of powerflow within the cim2pp converter

[heckstrahler]

No description provided.

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (3544151) 79.58% compared to head (36b7219) 79.55%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2158      +/-   ##
===========================================
- Coverage    79.58%   79.55%   -0.04%     
===========================================
  Files          255      255              
  Lines        27789    27798       +9     
===========================================
- Hits         22117    22115       -2     
- Misses        5672     5683      +11     

Files	Coverage Δ
...ter_classes/transformers/powerTransformersCim16.py	99.40% <100.00%> (+<0.01%)	⬆️
pandapower/converter/cim/cim2pp/from_cim.py	82.85% <ø> (ø)
pandapower/converter/cim/cim2pp/build_pp_net.py	70.62% <31.25%> (-5.85%)	⬇️

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