Interpolate function for training

[antimora]

Left over todo items from #1246

• [ ] Autodiff backend. (which means that training is currently unavailable)
• [ ] Anti-aliasing for bilinear and bicubic interpolation.
• [ ] Parameter align_corners for bilinear and bicubic interpolation. (for more information check here)
• [ ] Mode nearest-exact. (see the link previous for details)
• [ ] More test cases.
• [ ] Documentation

[louisfd]

Thanks to @ashdtu training is now available with nearest mode