Update tests based on feedback

- Add comment to some tests that will break when #102745 is implemented
- Mark a test with known-bug
- Delete duplicate test

src/test/ui/async-await/in-trait/async-example-desugared-boxed.rs

@@ -13,6 +13,7 @@ trait MyTrait {
 }
 
 impl MyTrait for i32 {
+    // This will break once a PR that implements #102745 is merged
     fn foo(&self) -> Pin<Box<dyn Future<Output = i32> + '_>> {
         Box::pin(async {
             *self

src/test/ui/async-await/in-trait/async-example-desugared-in-trait.rs

@@ -12,6 +12,7 @@ trait MyTrait {
 }
 
 impl MyTrait for i32 {
+    // This will break once a PR that implements #102745 is merged
     async fn foo(&self) -> i32 {
         *self
     }

src/test/ui/async-await/in-trait/async-example-desugared.rs

@@ -12,6 +12,7 @@ trait MyTrait {
 }
 
 impl MyTrait for i32 {
+    // This will break once a PR that implements #102745 is merged
     fn foo(&self) -> impl Future<Output = i32> + '_ {
         async {
             *self

src/test/ui/async-await/in-trait/async-lifetimes.rs

@@ -1,12 +1,12 @@
+// check-fail
+// known-bug: #102682
 // edition: 2021
 
 #![feature(async_fn_in_trait)]
 #![allow(incomplete_features)]
 
 trait MyTrait<'a, 'b, T> {
     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T);
-    //~^ ERROR the parameter type `Self` may not live long enough
-    //~| ERROR the parameter type `T` may not live long enough
 }
 
 impl<'a, 'b, T, U> MyTrait<'a, 'b, T> for U {

src/test/ui/async-await/in-trait/async-lifetimes.stderr

@@ -1,5 +1,5 @@
 error[E0309]: the parameter type `Self` may not live long enough
-  --> $DIR/async-lifetimes.rs:7:43
+  --> $DIR/async-lifetimes.rs:9:43
    |
 LL |     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T);
    |                                           ^^^^^^^^^^^^^^^^^
@@ -8,7 +8,7 @@ LL |     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T);
    = note: ...so that the reference type `&'a Self` does not outlive the data it points at
 
 error[E0309]: the parameter type `T` may not live long enough
-  --> $DIR/async-lifetimes.rs:7:43
+  --> $DIR/async-lifetimes.rs:9:43
    |
 LL |     async fn foo(&'a self, key: &'b T) -> (&'a Self, &'b T);
    |                                           ^^^^^^^^^^^^^^^^^ ...so that the reference type `&'b T` does not outlive the data it points at