Rustdoc-Json: Add ResolvedPath type

[aDotInTheVoid]

We don't yet have a ResolvedPath type in the json output, so I think that should be done in a followup change, as theirs a couple of other places we'd also want to use it (

rust/src/librustdoc/json/conversions.rs

Line 423 in e141246

// FIXME: should `trait_` be a clean::Path equivalent in JSON?

,

rust/src/librustdoc/json/conversions.rs

Line 500 in e141246

let trait_ = clean::Type::Path { path: trait_ }.into_tcx(tcx);

)

Originally posted by @aDotInTheVoid in #99787 (comment)

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

[aDotInTheVoid]

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