Don't show AH price on non-transferable rift items while in the rift

[LJNeon]

Before this change:

After this change:

Transferable items remain unchanged:

fixes #1883

[LJNeon]

One question for any reviewers, which of these would be better to use when determining if an item is non-transferable? I swear there was a rift_transferable in the item's custom data but now I can't find it... so I guess only the first option works?

ItemUtils.getLoreLineIf(stack, line -> line.contains("Rift-Transferable")) == null

ItemUtils.getCustomData(stack).getIntOr("rift_transferable", 0) == 0

!ItemUtils.getCustomData(stack).getBooleanOr("rift_transferable", false)

(or any other method I wasn't able to find)

[AzureAaron]

It would be better to just remove the price from the items in the api.

[LJNeon]

I believe when I mentioned that before I was told those items do exist outside of the rift as rare collectables due to past bugs. But if that's not an issue then I agree completely.