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, 16 insertions, 0 deletions

diff --git a/tests/rustdoc/const-generics/auxiliary/extern_crate.rs b/tests/rustdoc/const-generics/auxiliary/extern_crate.rs
new file mode 100644
index 00000000000..55b632a48f2
--- /dev/null
+++ b/tests/rustdoc/const-generics/auxiliary/extern_crate.rs
@@ -0,0 +1,16 @@
+// edition:2018
+pub fn extern_fn<const N: usize>() -> impl Iterator<Item = [u8; N]> {
+    [[0; N]; N].iter().copied()
+}
+
+pub struct ExternTy<const N: usize> {
+    pub inner: [u8; N],
+}
+
+pub type TyAlias<const N: usize> = ExternTy<N>;
+
+pub trait WTrait<const N: usize, const M: usize> {
+    fn hey<const P: usize>() -> usize {
+        N + M + P
+    }
+}