Enable re-labeling non-sequential label images

[haesleinhuepf]

It might be nice to enable re-labeling of non-sequentially labeled images / measurements. Therefore, we need to use skimage map_array. We might want to program a function similar to this one and then use it from the clusters-plotter for example:

napari-skimage-regionprops/napari_skimage_regionprops/_parametric_images.py

Line 73 in 25a0789

def relabel(image, measurements):

We should not change the existing function for backwards-compatibility reasons. But if the new one works nicely, we can mark the old as deprecated.

CC @lazigu @marabuuu