Auto merge of #106458 - albertlarsan68:move-tests, r=jyn514

Move src/test to the root

See MCP at rust-lang/compiler-team#573

There may be more changes needed.

The first commit is just the move of the files:
You can check that the first commit did not do anything else than renames by running
```
git diff --diff-filter=r -M100% <rust-lang remote>/master <first commit hash>
```
The output should be empty, because the filter excludes renames, and the match threshold for qualifying a rename is 100%.

The second one is mostly a "find and replace" of `src/test` to `tests` and whatever is needed to make CI pass.

What is left to do:
---

- [x] Move directory
- [ ] Change references to `src/test`
    - [x] Change references in-tree
    - [ ] Change references in submodules / out-of-tree docs
- [x] Make CI pass:
    - [x] Fix tidy
    - [x] Fix tests
    - [x] Bless tests if needed (shouldn't normally)
- [ ] Merge it !

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/ui/async-await/in-trait/async-example-desugared-manual.rs b/tests/ui/async-await/in-trait/async-example-desugared-manual.rs
new file mode 100644
index 00000000000..71473e7455f
--- /dev/null
+++ b/tests/ui/async-await/in-trait/async-example-desugared-manual.rs
@@ -0,0 +1,29 @@
+// edition: 2021
+
+#![feature(async_fn_in_trait)]
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use std::future::Future;
+use std::task::Poll;
+
+trait MyTrait {
+    async fn foo(&self) -> i32;
+}
+
+struct MyFuture;
+impl Future for MyFuture {
+    type Output = i32;
+    fn poll(self: std::pin::Pin<&mut Self>, _: &mut std::task::Context<'_>) -> Poll<Self::Output> {
+        Poll::Ready(0)
+    }
+}
+
+impl MyTrait for u32 {
+    fn foo(&self) -> MyFuture {
+        //~^ ERROR method `foo` should be async
+        MyFuture
+    }
+}
+
+fn main() {}