[RomApp] Take into account non converged solutions in Linear and NonLinear (ANN-Enhanced) Decoders

[Rbravo555]

📝 Description
This PR allows to take into account the nonconverged solutions when this parameters is true

general_rom_manager_parameters["ROM"]["use_non_converged_sols"].GetBool()

In future PRs we should include other types of SVDs, e.g. partitioned or parallel methods, to be used with the RomManager for cases where matrices are too large to fit in fast memory.

🆕 Changelog

• Changed method _LaunchComputeSolutionBasis in RomManager to consider nonconversed solutions
• Changed _GetTrainingData method in rom_nn_trainer.py to simplify the inclusion of nonconverged solutions while training a neural network
• Fixed a typo in the RomManager

[NicolasSR]

Checked the code and tested it. Everything looks fine.
As an idea for the future, we could limit the number of non-converged samples to store, by just skipping every n'th step or something more sophisticated