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, 63 insertions, 0 deletions

diff --git a/tests/ui/structs-enums/class-separate-impl.rs b/tests/ui/structs-enums/class-separate-impl.rs
new file mode 100644
index 00000000000..3d6da1cc280
--- /dev/null
+++ b/tests/ui/structs-enums/class-separate-impl.rs
@@ -0,0 +1,63 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(non_camel_case_types)]
+
+use std::fmt;
+
+struct cat {
+    meows : usize,
+
+    how_hungry : isize,
+    name : String,
+}
+
+impl cat {
+    pub fn speak(&mut self) { self.meow(); }
+
+    pub fn eat(&mut self) -> bool {
+        if self.how_hungry > 0 {
+            println!("OM NOM NOM");
+            self.how_hungry -= 2;
+            return true;
+        }
+        else {
+            println!("Not hungry!");
+            return false;
+        }
+    }
+}
+
+impl cat {
+    fn meow(&mut self) {
+        println!("Meow");
+        self.meows += 1;
+        if self.meows % 5 == 0 {
+            self.how_hungry += 1;
+        }
+    }
+}
+
+fn cat(in_x : usize, in_y : isize, in_name: String) -> cat {
+    cat {
+        meows: in_x,
+        how_hungry: in_y,
+        name: in_name
+    }
+}
+
+impl fmt::Display for cat {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.name)
+    }
+}
+
+fn print_out(thing: Box<dyn ToString>, expected: String) {
+  let actual = (*thing).to_string();
+  println!("{}", actual);
+  assert_eq!(actual.to_string(), expected);
+}
+
+pub fn main() {
+  let nyan: Box<dyn ToString> = Box::new(cat(0, 2, "nyan".to_string())) as Box<dyn ToString>;
+  print_out(nyan, "nyan".to_string());
+}