Further split in parameters between the parent and PCE class

examples/analytical-function/example_analytical_function.py

examples/user_guide/example_user_guide.py

src/bayesvalidrox/surrogate_models/engine.py

src/bayesvalidrox/surrogate_models/polynomial_chaos.py

src/bayesvalidrox/surrogate_models/sequential_design.py

src/bayesvalidrox/surrogate_models/surrogate_models.py