Allow array for line opts in dataset

[LeeLenaleee]

resolves #10176

[etimberg]

I tested this out and I'm kind of surprised that it works, though the array only applies to the point colours

[LeeLenaleee]

Yeah, not sure if we might want to change it for V4 that you only can do it with the pointBackgroundColor etc. Since it doesnt work for fill and line segments etc like you might expect it to do.

But for V3 it needs to be typed correctly, edited it now so the current opts stay as is, because otherwise some would become invalid. And added the common element ops and hover opts which are the ones that support array format as seperate entries that gets extended from

[Slion]

Thanks guys for the quick turnaround. I was using this feature since I have so many points the line segments are not visible anyway. However what I would really need is to be able to set the line segments colors. I came across #9692 and was wondering if this is what I was looking for. I have yet to try it though.