Provide more context on derived obligation error primary label

Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:

```
error[E0277]: the trait bound `i32: Bar` is not satisfied
 --> f100.rs:6:6
  |
6 |     <i32 as Foo>::foo();
  |      ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
  |
help: this trait has no implementations, consider adding one
 --> f100.rs:2:1
  |
2 | trait Bar {}
  | ^^^^^^^^^
note: required for `i32` to implement `Foo`
 --> f100.rs:3:14
  |
3 | impl<T: Bar> Foo for T {}
  |         ---  ^^^     ^
  |         |
  |         unsatisfied trait bound introduced here
```

Fix #40120.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/ui/traits/inductive-overflow/supertrait-auto-trait.stderr b/tests/ui/traits/inductive-overflow/supertrait-auto-trait.stderr
index e723c7c5181..629ccac49c5 100644
--- a/tests/ui/traits/inductive-overflow/supertrait-auto-trait.stderr
+++ b/tests/ui/traits/inductive-overflow/supertrait-auto-trait.stderr
@@ -10,7 +10,7 @@ error[E0277]: the trait bound `NoClone: Copy` is not satisfied
   --> $DIR/supertrait-auto-trait.rs:16:23
    |
 LL |     let (a, b) = copy(NoClone);
-   |                  ---- ^^^^^^^ the trait `Copy` is not implemented for `NoClone`
+   |                  ---- ^^^^^^^ the trait `Copy` is not implemented for `NoClone`, which is required by `NoClone: Magic`
    |                  |
    |                  required by a bound introduced by this call
    |