Unknown ID errors in commands show a raw "ResourceKey[...]"

When a command is given an ID that doesn't exist, the error message shows the internal ResourceKey text instead of the ID.

for example, /summon minecraft:nope gives Can't find element 'ResourceKey[minecraft:entity_type / minecraft:nope]' of type 'minecraft:entity_type instead of Can't find element 'minecraft:nope' of type 'minecraft:entity_type. It affects every command that uses a resource argument. This regression is introduced in 26.4 snapshot 8, which changed ResourceArgument to read the ID as a ResourceKey.

Steps to reproduce:

• Open a world with cheats enabled.

• Type /summon minecraft:nope in chat.

• Look at the error above the chat box, then press enter and observe the result.

Expected result:

Can't find element 'minecraft:nope' of type 'minecraft:entity_type'

Observed result:

Can't find element 'ResourceKey[minecraft:entity_type / minecraft:nope]' of type 'minecraft:entity_type'