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, 30 insertions, 0 deletions

diff --git a/tests/ui/threads-sendsync/task-comm-0.rs b/tests/ui/threads-sendsync/task-comm-0.rs
new file mode 100644
index 00000000000..2b9a50e4d41
--- /dev/null
+++ b/tests/ui/threads-sendsync/task-comm-0.rs
@@ -0,0 +1,30 @@
+// run-pass
+#![allow(unused_must_use)]
+// ignore-emscripten no threads support
+
+use std::thread;
+use std::sync::mpsc::{channel, Sender};
+
+pub fn main() { test05(); }
+
+fn test05_start(tx : &Sender<isize>) {
+    tx.send(10).unwrap();
+    println!("sent 10");
+    tx.send(20).unwrap();
+    println!("sent 20");
+    tx.send(30).unwrap();
+    println!("sent 30");
+}
+
+fn test05() {
+    let (tx, rx) = channel();
+    let t = thread::spawn(move|| { test05_start(&tx) });
+    let mut value: isize = rx.recv().unwrap();
+    println!("{}", value);
+    value = rx.recv().unwrap();
+    println!("{}", value);
+    value = rx.recv().unwrap();
+    println!("{}", value);
+    assert_eq!(value, 30);
+    t.join();
+}