Inlay hints for function that returns trait type generic

[karto]

My VSCode does not show type hints (and the wrong hint) when a function returns a generics from a trait type.

With associated_types it shows unknown
See the third last line

inlay_hint_associated_types.rs.txt

With feature(generic_associated_types) it shows Foo
See the third last line

inlay_hint_generic_associated_types.rs.txt

[iDawer]

The latest r-a seems ok at the first example.
The second is related to #9673

[Veykril]

This works now