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, 11 insertions, 0 deletions

diff --git a/tests/rustdoc/const-generics/const-generic-slice.rs b/tests/rustdoc/const-generics/const-generic-slice.rs
new file mode 100644
index 00000000000..4279de91f56
--- /dev/null
+++ b/tests/rustdoc/const-generics/const-generic-slice.rs
@@ -0,0 +1,11 @@
+#![crate_name = "foo"]
+
+pub trait Array {
+    type Item;
+}
+
+// @has foo/trait.Array.html
+// @has - '//*[@class="impl has-srclink"]' 'impl<T, const N: usize> Array for [T; N]'
+impl<T, const N: usize> Array for [T; N] {
+    type Item = T;
+}