API C LegendaryCrafting.IsUpgradeItemValidForRuneforgeLegendary

Needs summary.
 isValid = C_LegendaryCrafting.IsUpgradeItemValidForRuneforgeLegendary(runeforgeLegendary, upgradeItem)
==Arguments==
:;runeforgeLegendary:
:;upgradeItem:
==Returns==
:;isValid:
==Patch changes==