[Enh]: Align floordiv behavior across different backends

[FBruzzesi]

As follow up of #2636, we should aim to align floordiv behavior across backends whenever possible.

Updates

1. Currently work in progress in fix/align-div-by-zero branch.
2. pandas is gonna be fun, especially for typing 🤯
3. After all, this is not too bad for pandas-like case (3552f91), but this is the best I could do in typing (fd759b3)
4. I am close to having it ready, I would like to add a few more test cases, including the right (__rfloordiv__ and __rtruediv__) version of the ops