More Dragon Immune Blocks - Minecraft Data Pack

There's a number of blocks that seem like they should be immune to the destruction caused by the Ender Dragon, but aren't. This is here to fix that.

On top of the standard blocks that are already immune to the Ender Dragon, here's a list of the additional blocks with immunity:

Iron Blocks
Iron Doors & Iron Trapdoors
Anvils, Cauldrons, & Hoppers
Buttons
Pressure Plates
Banners
Chains & Lanterns
Diamond Blocks
Ancient Debris & Netherite Blocks
Lodestone
Pointed Dripstone
Chorus Plants & Chorus Flowers
Conduits
Sea Lanterns
Prismarine & related blocks
End Stone Bricks & related blocks
Purpur Blocks & related blocks
End Rods
Ender Chests
Enchanting Tables
Shulker Boxes
Spawners
Beacons
Dragon Eggs
Dragon Heads

Some blocks were made immune not just because it would make sense, but rather for convenience, or for another gameplay-related reason.

Iron-type blocks are immune for parity with Iron Bars.
Pointed Dripstone is immune to make them reliably fall when the Ender Dragon destroys the block holding it (the same is partially relevant to Anvils as well).
Conduits, Sea Lanterns, and Prismarine are immune to follow the logic of Endermen being vulnerable to water.