Rollup merge of #128357 - compiler-errors:shadowed-non-lifetime-binder, r=petrochenkov

Detect non-lifetime binder params shadowing item params

We should check that `for<T>` shadows `T` from an item in the same way that `for<'a>` shadows `'a` from an item.

r? ``@petrochenkov`` since you're familiar w the nuances of rib kinds

Author: matthiaskrgr