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, 50 deletions

diff --git a/src/test/rustdoc-ui/coverage/basic.rs b/src/test/rustdoc-ui/coverage/basic.rs
deleted file mode 100644
index 6c26b751c5e..00000000000
--- a/src/test/rustdoc-ui/coverage/basic.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-// compile-flags:-Z unstable-options --show-coverage
-// check-pass
-
-#![feature(extern_types)]
-
-//! Make sure to have some docs on your crate root
-
-/// This struct is documented, but its fields are not.
-///
-/// However, one field is private, so it shouldn't show in the total.
-pub struct SomeStruct {
-    pub some_field: usize,
-    other_field: usize,
-}
-
-impl SomeStruct {
-    /// Method with docs
-    pub fn this_fn(&self) {}
-
-    // Method without docs
-    pub fn other_method(&self) {}
-}
-
-// struct without docs
-pub struct OtherStruct;
-
-// function with no docs
-pub fn some_fn() {}
-
-/// Function with docs
-pub fn other_fn() {}
-
-pub enum SomeEnum {
-    /// Some of these variants are documented...
-    VarOne,
-    /// ...but some of them are not.
-    VarTwo,
-    // (like this one)
-    VarThree,
-}
-
-/// There's a macro here, too
-#[macro_export]
-macro_rules! some_macro {
-    () => {};
-}
-
-extern "C" {
-    pub type ExternType;
-}