pub fn compute_alias_components_recursive<I>(
    cx: I,
    kind: AliasTyKind,
    alias_ty: AliasTy<I>,
    out: &mut SmallVec<[Component<I>; 4]>,
)where
    I: Interner,Expand description
Collect Components for all the args of alias_ty.
This should not be used to get the components of alias_ty itself.
Use push_outlives_components instead.