Remove _result_properties dict and instead just rely on ResultInfo

[rafacanton]

Description of the feature

We have a _result_properties enum in available_result.py that is ininmaintenable:

• Duplicated from the Server.
• Hardcoded to MAPDL logic.
• Could lead to problems, as the location of a result depends on the solver, and cannot be known in advance.

We should remove it and just rely on the ResultInfo. Changes in pydpf-core are not that large (see attached temptative PR), but changes in pydpf-post are huge, as _result_properties is highly embedded in skin logic. This needs to be properly planned and assessed.

[rafacanton]

@PProfizi