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, 22 insertions, 0 deletions

diff --git a/tests/ui/threads-sendsync/thread-local-syntax.rs b/tests/ui/threads-sendsync/thread-local-syntax.rs
new file mode 100644
index 00000000000..2f4805e4731
--- /dev/null
+++ b/tests/ui/threads-sendsync/thread-local-syntax.rs
@@ -0,0 +1,22 @@
+// run-pass
+#![deny(missing_docs)]
+//! this tests the syntax of `thread_local!`
+
+mod foo {
+    mod bar {
+        thread_local! {
+            // no docs
+            #[allow(unused)]
+            static FOO: i32 = 42;
+            /// docs
+            pub static BAR: String = String::from("bar");
+
+            // look at these restrictions!!
+            pub(crate) static BAZ: usize = 0;
+            pub(in foo) static QUUX: usize = 0;
+        }
+        thread_local!(static SPLOK: u32 = 0);
+    }
+}
+
+fn main() {}