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, 65 deletions

diff --git a/src/test/rustdoc-ui/coverage/json.rs b/src/test/rustdoc-ui/coverage/json.rs
deleted file mode 100644
index a591cd5dba4..00000000000
--- a/src/test/rustdoc-ui/coverage/json.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-// check-pass
-// compile-flags:-Z unstable-options --output-format json --show-coverage
-
-pub mod foo {
-    /// Hello!
-    pub struct Foo;
-    /// Bar
-    pub enum Bar { A }
-}
-
-/// X
-pub struct X;
-
-/// Bar
-///
-/// ```
-/// let x = 12;
-/// ```
-pub mod bar {
-    /// bar
-    pub struct Bar;
-    /// X
-    pub enum X {
-        /// ```
-        /// let x = "should be ignored!";
-        /// ```
-        Y
-    }
-}
-
-/// yolo
-///
-/// ```text
-/// should not be counted as a code example!
-/// ```
-pub enum Yolo { X }
-
-impl Yolo {
-    /// ```
-    /// let x = "should be ignored!";
-    /// ```
-    pub const Const: u32 = 0;
-}
-
-pub struct Xo<T: Clone> {
-    /// ```
-    /// let x = "should be ignored!";
-    /// ```
-    x: T,
-}
-
-/// ```
-/// let x = "should be ignored!";
-/// ```
-pub static StaticFoo: u32 = 0;
-
-/// ```
-/// let x = "should be ignored!";
-/// ```
-pub const ConstFoo: u32 = 0;
-
-/// ```
-/// let x = "should be ignored!";
-/// ```
-pub type TypeFoo = u32;