`from_NCHW_to_NHWC()` and `from_NHWC_to_NCHW()`

[MirkoCalvi]

Feature Description

Implement a method for each conversion type that takes as input a TensorZant and returns a TensorZant. The methods must be placed inside src/IR_zant/utils.zig. Pay attention, it also affects the TensorZant.ptr: ?*AnyTensor. So ensure that the pointer refers to a new Tensor with the correct shape and weight disposition.

NHWC vs NCHW : A memory access perspective on GPUs

Understanding Memory Formats