Auto merge of #86226 - JohnTitor:rollup-5ubdolf, r=JohnTitor

Rollup of 7 pull requests

Successful merges:

 - #85800 (Fix some diagnostic issues with const_generics_defaults feature gate)
 - #85823 (Do not suggest ampmut if rhs is already mutable)
 - #86153 (Print dummy spans as `no-location`)
 - #86174 (Detect incorrect vtable alignment during const eval)
 - #86189 (Make `relate_type_and_mut` public)
 - #86205 (Run full const-generics test for issue-72293)
 - #86217 (Remove "generic type" in boxed.rs)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup