this is now able to determine which properties were renamed and/or changed when multiple renames occurred in a single version.
This also fixes unrelated properties being considered mapped to each other when there was only one property in the old and new state (e.g. mapped_type and deprecated for hay_bale in 1.10). Now, these are properly considered as unrelated.
this significantly reduces the size of schemas when state remaps are used (see pmmp/BedrockBlockUpgradeSchema@85b83b360e).
in addition, this will likely offer a substantial performance and memory saving when walls get flattened, which will eventually happen.
this reduces the footprint of RuntimeBlockMapping by a further 1 MB, as well as simplifying various parts of the code, and solidifying the immutability guarantee of BlockStateData.
