Support ParameterExpression objects inside PolynomialTensor

[mrossinek]

What is the expected enhancement?

#828 suggests supporting parameters in SparseLabelOp objects.
This issue separately tracks the support of parameters inside of PolynomialTensor objects. I do not think that this requires much as roughly shown in this comment.

This will also enable the parametrization of classes in the qiskit_nature.second_q.hamiltonians module which contain PolynomialTensor instances without requiring further modifications.