Allow subsetting simulation conditions in simulate_petab

simulate_petab was mainly intended to simulate all conditions at once,
but the `simulation_conditions` argument provides also an easy way to
simulate only a subset of conditions. However, this currently fails,
because the full parameter mapping is used an then wrong conditions
are assigned.

This is fixed here. Also it saved a minuscule amount of time.

python/sdist/amici/petab_objective.py

@@ -516,6 +516,7 @@ def create_parameter_mapping(
             observable_df=petab_problem.observable_df,
             mapping_df=petab_problem.mapping_df,
             model=petab_problem.model,
+            simulation_conditions=simulation_conditions,
             **dict(
                 default_parameter_mapping_kwargs, **parameter_mapping_kwargs
             ),