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, 0 insertions, 20 deletions

diff --git a/src/test/rustdoc-ui/auxiliary/overflow.rs b/src/test/rustdoc-ui/auxiliary/overflow.rs
deleted file mode 100644
index ff65936bec9..00000000000
--- a/src/test/rustdoc-ui/auxiliary/overflow.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-pub struct B0;
-pub struct B1;
-use std::ops::Shl;
-use std::ops::Sub;
-pub type Shleft<A, B> = <A as Shl<B>>::Output;
-pub type Sub1<A> = <A as Sub<B1>>::Output;
-pub struct UInt<U, B> {
-    pub(crate) msb: U,
-    pub(crate) lsb: B,
-}
-impl<U, B, Ur, Br> Shl<UInt<Ur, Br>> for UInt<U, B>
-where
-    UInt<Ur, Br>: Sub<B1>,
-    UInt<UInt<U, B>, B0>: Shl<Sub1<UInt<Ur, Br>>>,
-{
-    type Output = Shleft<UInt<UInt<U, B>, B0>, Sub1<UInt<Ur, Br>>>;
-    fn shl(self, rhs: UInt<Ur, Br>) -> Self::Output {
-        unimplemented!()
-    }
-}