Add forward simulation method

[BradyPlanden]

Feature description

Add a simple simulation class for synthetic data generation used in tests and benchmarking.

Motivation

No response

Possible implementation

Built in BaseModel, this would provide functionality for the pybamm models; however, internal models such as a future EHM implementation would need their own definition of the pybamm.Simulation class. Given pybop follows the pybamm model class structure, it might be relavently simplistic to use the pybamm.Simulation class (will be brittle to pybamm changes though).

 def sim(self, experiment=None, parameter_set=None):
        """
        Simulate the model
        """
        self.parameter_set = parameter_set or self.parameter_set
        if self._built_model is None:
            raise ValueError("Model must be built before simulating")
        return pybamm.Simulation(
            self._built_model,
            experiment=experiment,
            parameter_values=self.parameter_set
        )

Example usage:

model = pybop.model.lithium_ion.spm()
synthetic_sim = model.sim()
term_V =synthetic_sim.solve()["Terminal voltage [V]"].data

Additional context

No response