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, 26 insertions, 0 deletions

diff --git a/tests/ui/resolve/tuple-struct-alias.stderr b/tests/ui/resolve/tuple-struct-alias.stderr
new file mode 100644
index 00000000000..a739ea43eed
--- /dev/null
+++ b/tests/ui/resolve/tuple-struct-alias.stderr
@@ -0,0 +1,26 @@
+error[E0532]: expected tuple struct or tuple variant, found type alias `A`
+  --> $DIR/tuple-struct-alias.rs:7:9
+   |
+LL | struct S(u8, u16);
+   | ------------------ similarly named tuple struct `S` defined here
+...
+LL |         A(..) => {}
+   |         ^ help: a tuple struct with a similar name exists: `S`
+   |
+   = note: can't use a type alias as a constructor
+
+error[E0423]: expected function, tuple struct or tuple variant, found type alias `A`
+  --> $DIR/tuple-struct-alias.rs:5:13
+   |
+LL | struct S(u8, u16);
+   | ------------------ similarly named tuple struct `S` defined here
+...
+LL |     let s = A(0, 1);
+   |             ^ help: a tuple struct with a similar name exists: `S`
+   |
+   = note: can't use a type alias as a constructor
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0423, E0532.
+For more information about an error, try `rustc --explain E0423`.