[GeoMechanicsApplication] Auxiliar_process_list or auxilliary_process_list

[WPK4FEM]

Magically both seem to be accepted reading the ProjectParameters.json files.
It is not clear why. If possible stick to the spelling with y.

After some further investigation:

• 3 different spellings occur: auxiliar_process_list, auxiliary_process_list, auxilliary_process_list
• only c_phi and K0 procedure tests use this list, they mostly use auxilliary_process_list ( only test settlement workflow uses auxiliar ) and run correctly
• all other occurences in .json files are empty lists. When removing the empty list definition, the tests still pass
• when I change constraints_process_list to aapjes_process_list and loads_process_list to nootjes_process_list the test still passes. However, output_processes is apparently checked. Changing output_processes to something_else leads to no output generated.
• json_process_info_parser.cpp and test_process_info_parser.cpp use auxiliar_process_list

Proposed actions:

1: remove all empty occurances of auxiliar_process_list
2: use correct spelling in the non-empty auxilliary_process_list

Acceptance criteria:

When: No K0 or C/Phi reduction process is present,
Then: No Auxilliary_process_list is in the ProjectParameters.json file

When: A K0 or C/Phi is present in ProjectParameters.json in a python or c++ workflow
Then: It is in a correctly spelled auxilliary_process_list