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, 0 insertions, 36 deletions

diff --git a/src/test/ui/threads-sendsync/task-comm-14.rs b/src/test/ui/threads-sendsync/task-comm-14.rs
deleted file mode 100644
index 88d6b090268..00000000000
--- a/src/test/ui/threads-sendsync/task-comm-14.rs
+++ /dev/null
@@ -1,36 +0,0 @@
-// run-pass
-#![allow(unused_parens)]
-// ignore-emscripten no threads support
-
-use std::sync::mpsc::{channel, Sender};
-use std::thread;
-
-pub fn main() {
-    let (tx, rx) = channel();
-
-    // Spawn 10 threads each sending us back one isize.
-    let mut i = 10;
-    while (i > 0) {
-        println!("{}", i);
-        let tx = tx.clone();
-        thread::spawn({let i = i; move|| { child(i, &tx) }});
-        i = i - 1;
-    }
-
-    // Spawned threads are likely killed before they get a chance to send
-    // anything back, so we deadlock here.
-
-    i = 10;
-    while (i > 0) {
-        println!("{}", i);
-        rx.recv().unwrap();
-        i = i - 1;
-    }
-
-    println!("main thread exiting");
-}
-
-fn child(x: isize, tx: &Sender<isize>) {
-    println!("{}", x);
-    tx.send(x).unwrap();
-}