[MCPE-100267] ID changes left behind legacy IDs

The ID changes from the 1.18 betas are a great step to parity, but now duplicate item IDs exist.

All items that changed their ID have their old ID still as a valid value, eg record_mellohi alongside music_disc_mellohi.
This affects both renamed items and items which got split up (dyes, boats, spawn eggs).

Item	Remnant ID	Note
Turtle Scute	`turtle_shell_piece` `scute`
Enchanted Apple	`appleenchanted`
Dark Oak Sign	`darkoak_sign`
Boat	`boat`
Lodestone Compass	`lodestonecompass`
Raw Cod	`fish`
Tropical Fish	`clownfish`
Cooked Cod	`cooked_fish`
Dye	`dye`
Melon	`melon`	Needs to be done to allow `melon_block` to `melon` rename.
Glistering Melon	`speckled_melon`
Spawn Egg	`spawn_egg`	Using this ID without a data value gives a broken spawn egg.
Fire Charge	`fireball`
Empty Map	`emptymap`
Carrot on a Stick	`carrotonastick`
Nether Star	`netherstar`
Firework Rocket	`fireworks`
Firework Star	`fireworkscharge`
Iron Horse Armor	`ironhorsearmor`
Gold Horse Armor	`goldhorsearmor`
Diamond Horse Armor	`diamondhorsearmor`
Leather Horse Armor	`leatherhorsearmor`
Raw Mutton	`muttonraw`
Cooked Mutton	`muttoncooked`
Popped Chorus Fruit	`chorus_fruit_popped`
Totem of Undying	`totem`
Music Disc - 13	`record_13`
Music Disc - Cat	`record_cat`
Music Disc - Blocks	`record_blocks`
Music Disc - Chrip	`record_chirp`
Music Disc - Far	`record_far`
Music Disc - Mall	`record_mall`
Music Disc - Mellohi	`record_mellohi`
Music Disc - Stal	`record_stal`
Music Disc - Strad	`record_strad`
Music Disc - Ward	`record_ward`
Music Disc - 11	`record_11`
Music Disc - Wait	`record_wait`
Music Disc - Pigstep	`record_pigstep`
Music Disc - 5	`record_5`	Was added after the other record renames.
Music Disc - Relic	`record_relic`	Was added after the other record renames.
Banner Pattern	`banner_pattern`
Name Tag	`nametag`
Wool	`wool`
Fence	`fence`
Carpet	`carpet`
Oak/Spruce/Birch/Jjngle Log	`log`
Acacia/Dark Oak Log	`log2`
Coral	`coral`
Concrete	`concrete`
Stained Glass	`stained_glass`
Stained Glass Pane	`stained_glass_pane`
Concrete Powder	`concrete_powder`
Colored Terracotta	`stained_hardened_clay`
Planks	`planks`
Stone Variants	`stone`	Only the variants should be removed, not the ID as "Stone" uses (and should use) that as ID.
Hard Stained Glass	`hard_stained_glass`	Education exclusive.
Hard Stained Glass Pane	`hard_stained_glass_pane`	Education exclusive.
Grass Block	`grass`
Oak/Spruce/Birch/Jungle Leaves	`leaves`
Acacia/Dark Oak Leaves	`leaves2`
Double Wooden Slabs	`double_wooden_slab`
Wooden Slabs	`wooden_slab`

These IDs are no longer suggested, but do still work.

Behavior packs and command blocks, already store the version they're made in, which makes them look what the command would do in that version, not the current one. The alliases are not at all needed for backwards compatibility, additionally, this is preventing the full flattening from happening, as a bunch of IDs are changed to another thing in java's flattening. melon: melon slice -> melon block, stone_slab: smooth stone, sandstone, cobblestone, brick, stone brick, quartz and nether brick slab -> actual stone slab, etc. so in order for the full flattening to propperly happen, these legacy IDs need to go, and doing so will NOT break old command contraptions and behavior packs already.