chore: remove unnecessary temporary std::pair in enum pybind11 class

[Skylion007]

Description

• I noticed that one of the enum values was using casting a std::pair into a tuple immediately. We can avoid the std::pair -> python tuple cast entirely by just filling the corresponding tuple using pybind11::make_tuple defined in cast.h which is already a dependency. This change serves two purposes:

1. Make the code more readable by showing that we are just adding a tuple to a python dictionary
2. Slight code/code gen optimization by removing a temporary std::pair casting.