Merge branch 'feature/VECTO-1580-adapt-gui-to-edit-iepc-component-data' into feature/VECTO-1579-create-json-filewriter-for-iepc

Merge branch 'feature/VECTO-1580-adapt-gui-to-edit-iepc-component-data' into feature/VECTO-1579-create-json-filewriter-for-iepc

Merge branch 'feature/VECTO-1580-adapt-gui-to-edit-iepc-component-data' into feature/VECTO-1579-create-json-filewriter-for-iepc

# Conflicts:
#	VectoCore/VectoCore/InputData/FileIO/JSON/JSONIEPCData.cs

Merge in VECTO/vecto-dev from VECTO/hm_vecto-dev:develop to develop

* commit '2353fbaf':
  fixed invisible output view in VECTO3GUI2020

Merge in VECTO/vecto-dev from VECTO/mq_vecto-dev:feature/VECTO-1581-implement-data-adapter-for-iepc to develop

* commit '0da3afc4':
  introduce dedicated powertrain component for IEPC, only for writing correct columns (and column names) in .vmod file adapt sum-file for IEPC as well
  refactoring IEPC: do not use an axlegear if the IEPC already contains the axlegear
  implementing separate method in powertain builder for IEPCs, implement single-speed gearbox for IEPCs with only one gear, adding testcases for single-speed IEPCs
  adding testdata for single-speed IEPC, testdata for gear-dependend drag curves in IEPC
  adding missing files: testcase, EM and IEPC reader classes (moved to separate files)
  adding more testdata for iepc testcases
  adding testcases for IEPC variants, adding implementation for IEPC wit included transmission - works
  switching projects from .net 5.0 to .net 6.0
  started working on data adapter for IEPC

introduce dedicated powertrain component for IEPC, only for writing correct columns (and column names) in .vmod file
adapt sum-file for IEPC as well

implementing separate method in powertain builder for IEPCs, implement single-speed gearbox for IEPCs with only one gear, adding testcases for single-speed IEPCs

Merge in VECTO/vecto-dev from VECTO/mk_vecto-dev:develop to develop

* commit 'd96d2f70':
  corrected null-exception error for powertrains without gearbox

adding testcases for IEPC variants, adding implementation for IEPC wit included transmission - works

Merge in VECTO/vecto-dev from VECTO/fk_vecto-dev:feature/VECTO-1578-create-json-input-data-for-iepc to develop

* commit '1e5ef50f':
  update testdata path
  added iepc json reader test
  added iepc json reader
  added example test data

Merge in VECTO/vecto-dev from VECTO/mq_vecto-dev:feature/VECTO-1583-extend-electric-motor-to-use-gear-dependent-powermap to develop

* commit '28d3a058':
  add gear dependency in electric power map
  switch more projects back to .net version 5 to make it compatible with VS 2019