Shading model that takes into account the bypass diodes and layout of modules

[echedey-ls]

Is your feature request related to a problem? Please describe.
To sum it up, the model here divides the sectors of a PV module protected by bypass modules, and depending on the 2D shaded fraction and the number of shaded "blocks", it calculates a power correction modifier.

Describe the solution you'd like
A function that implements this model under shading.py with an example showcasing different bypass diodes layouts. This example would need the shaded fraction calculated at #1962

Describe alternatives you've considered
N/A.

Additional context
I've already posted this feature in the mailing list - this is part of my GSoC participation.