create res tables only for elements that exist in the network

[heckstrahler]

create res tables only for elements that exist in the network

closes #2556

[codecov]

Codecov Report

❌ Patch coverage is 82.58065% with 27 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.96%. Comparing base (ec6e28f) to head (fe0c72f).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
pandapower/convert_format.py	65.71%	12 Missing ⚠️
pandapower/results_gen.py	25.00%	6 Missing ⚠️
pandapower/shortcircuit/results.py	66.66%	4 Missing ⚠️
pandapower/toolbox/data_modification.py	77.77%	4 Missing ⚠️
pandapower/opf/pm_storage.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2813      +/-   ##
===========================================
- Coverage    73.97%   73.96%   -0.02%     
===========================================
  Files          348      349       +1     
  Lines        36822    36863      +41     
===========================================
+ Hits         27239    27264      +25     
- Misses        9583     9599      +16     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.1% Duplication on New Code

See analysis details on SonarQube Cloud