bos #32737 Allow to choose between MG-Tetra and MG-Tetra_HPC multithread

bos #32737 Allow to choose between MG-Tetra and MG-Tetra_HPC multithread

Update documentation to reflect availability of MGTetra HPC optionalities.

Doc improvement. Define new Set... methods in GHS3DPluginBuilder.py

Update methods SaveTo and LoadFrom to include new hypothesis options. Solve problems observed with hdf dumped files.

Fixing issues pointed. Eliminate reference to MG_TetraHPC_API class since it is not be used. Fix typo when MGTetra HPC (parallel_mode is parallel_strategy). Reuse the same command line for MGTetra and MGTetraHPC changing the called executable depending on the user selection. Define ghs3dSetParametersDemo.py as test folling suggested instructions.

Solving more issues. Carefull var init in constructor to avoid compilation warnings. Diasable EnforcedVertice and EnforceMesh widget when MGTetraHPC is selected. Avoid ref to non initialized class member on call to CommandToRun static method.

Fixing CmakeLists in examples to properly copy the test from python example file into the SALOME_TEST_INSTALLDIR. Add missing CTestTestfileInstall.cmake file as suggested.

Set reproducible_given_max_number_of_thread as default for MGTetraHPC and safe by default for MG-Tetra.

Set Maximal number of threads to true as default on the hypothesis.