Rustdoc-Json: Document Stripped Fields for enum varients

[aDotInTheVoid]

At some point their should also be a has_striped_fields for Variant, and probably a way to tell what position each of the non stripped items are, as currently each of these 3 variants are documented with the same inner.

enum Foo {
  A(i32)
  B(i32, #[doc(hidden)] i32)
  C(#[doc(hidden)] i32, i32)
}

but HTML gets a good representation:

The solution is probably to do what we do for structs, and store the StructType, and a Vec<Id>, such that each field of a varient gets an Item to hold the name. We also should have a num_fields, as even in that schema, you can't tell the difference between

enum Foo {
  A(#[doc(hidden)] i32),
  B(#[doc(hidden)]i32, #[doc(hidden)]i32)
}

This also effects struct AFAIKT.

I don't think this needs to be done now. I'll file an issue for it.

Originally posted by @aDotInTheVoid in #100582 (comment)

@rustbot modify labels: +A-rustdoc-json +T-rustdoc

[aDotInTheVoid]

Related: #92945