Added tag data for IFD groups

[radarhere]

Resolves #5553

At the moment, our list of tag data is 1 dimensional. It doesn't account for the fact that tags actually exist in different groups - see https://exiftool.org/TagNames/EXIF.html

This PR adds TAGS_V2_GROUPS, which is used when the tag in question is part of a group.

#5553 mentions that the wrong type is used for InteropVersion, part of the InteropIFD. The type information for that tag is added here.

[kmilos]

How is the possibility of a tag belonging to more than one group (==IFD?) handled?

For example, there is significant overlap between TIFF/EP and Exif tags, but in TIFF/EP they are part of the main image IFD0, while in Exif they are obviously part of ExifIFD.

[radarhere]

This PR doesn't force the tags to be unique across groups, no.

When saving the data in tobytes(), the current tag is passed to ImageFileDirectory_v2.

Pillow/src/PIL/TiffImagePlugin.py

Line 832 in a2709be

ifd = ImageFileDirectory_v2(ifh, group=tag)

Then, when looking up the info of a tag, this PR retrieves info according to the group. If group is not None, then it doesn't retrieve from TAGS_V2, and if it is not, then it only pulls from the group.

Pillow/src/PIL/TiffTags.py

Lines 45 to 48 in a2709be

	if group is not None:
	info = TAGS_V2_GROUPS[group].get(tag) if group in TAGS_V2_GROUPS else None
	else:
	info = TAGS_V2.get(tag)

So both IFD0 and EXIFIFD could have the same tag - which group is used comes from how the data is structured coming into tobytes().