Expose the pre and post travel overload of SetBreakIntervalsOfVehicle to Python

[hklarner]

What language and solver does this apply to?
Python, Routing, Ortools == 9.6.2534

Describe the problem you are trying to solve.
Three overloads of SetBreakIntervalsOfVehicle are available in CPP:

void SetBreakIntervalsOfVehicle	(
    std::vector< IntervalVar * > breaks,
    int vehicle,
    int pre_travel_evaluator,
    int post_travel_evaluator 
)	

void SetBreakIntervalsOfVehicle	(
    std::vector< IntervalVar * > breaks,
    int vehicle,
    std::vector< int64_t > node_visit_transits 
)	

void SetBreakIntervalsOfVehicle	(
    std::vector< IntervalVar * > breaks,
    int vehicle,
    std::vector< int64_t > node_visit_transits,
    std::function< int64_t(int64_t, int64_t)> delays 
)	

• see https://google.github.io/or-tools/cpp_routing/classoperations__research_1_1_routing_dimension.html#ae34995163df20f89961e907ac3b25532

But only one version is available in Python:

def SetBreakIntervalsOfVehicle(self, breaks: List[IntervalVar], vehicle: int, node_visit_transits: List[int]):

• see https://developers.google.com/optimization/reference/python/constraint_solver/pywrapcp#setbreakintervalsofvehicle

Describe the solution you'd like
Expose the pre and post travel overload of SetBreakIntervalsOfVehicle to Python