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, 13 deletions

diff --git a/src/test/rustdoc/traits-in-bodies-private.rs b/src/test/rustdoc/traits-in-bodies-private.rs
deleted file mode 100644
index 96b7c4f9dc0..00000000000
--- a/src/test/rustdoc/traits-in-bodies-private.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-// when implementing the fix for traits-in-bodies, there was an ICE when documenting private items
-// and a trait was defined in non-module scope
-
-// compile-flags:--document-private-items
-
-// @has traits_in_bodies_private/struct.SomeStruct.html
-// @!has - '//code' 'impl HiddenTrait for SomeStruct'
-pub struct SomeStruct;
-
-fn __implementation_details() {
-    trait HiddenTrait {}
-    impl HiddenTrait for SomeStruct {}
-}