Use qiskit for converting quasi-distribution

[vineetbansal]

Looks to me like this function:

cutqc2/src/cutqc2/cutqc/helper_functions/conversions.py

Line 81 in 47613b9

 def nearest_probability_distribution(quasiprobability): 

could be replaced by:

from qiskit.result import QuasiDistribution
return list(QuasiDistribution({i: p for i, p in enumerate(quasiprobability)}).nearest_probability_distribution().values())

Docs on this class here:
https://docs.quantum.ibm.com/api/qiskit/qiskit.result.QuasiDistribution