[F&E]: Isolate generation of interpolators

[alfonsoSR]

Description:

Several interpolators are used inside PRIDE, mostly to speed up access to precomputed information. The current solution for interpolation relies on scipy.interpolate.interp1d which is deprecated in favor of more concrete choices.

To ensure that the choice of interpolators is consistent across the program, it would be desirable to:

• Create an internal interface to generate interpolators through a function in pride.utils, and replace all explicit uses of scipy.interpolate.interp1d with calls to this interface function
• Study the different options for interpolation, and select one that we are sure fulfills our needs. An associated entry with a justification for this choice should be added to the API, making this information available to users

Suggestions for implementation:

1. Create an interface for scipy's utility to generate interpolation functions in pride.utils
2. Replace all explicit calls to scipy.interpolate... with calls to this interface

Additional context:

No response