nd2: some global metadata should actually be series metadata

[dominikl]

It looks like the nd2 reader puts a lot of metadata into the "global" metadata, which should actually be "series" metadata, see https://forum.image.sc/t/position-info-in-nd2-file-can-not-be-retrieved-correctly-by-bioformat/ .
"Besides dPosName, lots of other parameters should also be in the Series metadata as they are different for each series, for example, dPosX, dPosY, dPosZ, etc."

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/position-info-in-nd2-file-can-not-be-retrieved-correctly-by-bioformat/109544/6