Merge #7732

7732: Don't lower TypeBound::Lifetime as GenericPredicate::Error r=flodiebold a=Veykril

Basically we just discard the typebound for now instead when lowering to `GenericPredicate`. I think this shouldn't have any other side effects?

Fixes #7683(hopefully for real this time)

I also played around with introducing `GenericPredicate::LifetimeOutlives` and `GenericPredicate::TypeOutlives`(see b9d6904845) but that won't fix this issue(at least not for now) due to lifetime predicate mismatches when resolving methods so I figure this is a good way to fix it for now.

Co-authored-by: Lukas Wirth <lukastw97@gmail.com>

crates/ide/src/hover.rs

@@ -3417,7 +3417,7 @@ impl<T> Foo<T$0> {}
                 ```
                 "#]],
         );
-        // lifetimes aren't being substituted yet
+        // lifetimes bounds arent being tracked yet
         check(
             r#"
 struct Foo<T>(T);
@@ -3427,7 +3427,7 @@ impl<T: 'static> Foo<T$0> {}
                 *T*
 
                 ```rust
-                T: {error}
+                T
                 ```
                 "#]],
         );