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, 18 deletions

diff --git a/src/test/rustdoc/mut-params.rs b/src/test/rustdoc/mut-params.rs
deleted file mode 100644
index f3ea6995839..00000000000
--- a/src/test/rustdoc/mut-params.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-// Rustdoc shouldn't display `mut` in function arguments, which are
-// implementation details. Regression test for #81289.
-
-#![crate_name = "foo"]
-
-pub struct Foo;
-
-// @count foo/struct.Foo.html '//*[@class="impl-items"]//*[@class="method has-srclink"]' 2
-// @!has - '//*[@class="impl-items"]//*[@class="method"]' 'mut'
-impl Foo {
-    pub fn foo(mut self) {}
-
-    pub fn bar(mut bar: ()) {}
-}
-
-// @count foo/fn.baz.html '//*[@class="rust fn"]' 1
-// @!has - '//*[@class="rust fn"]' 'mut'
-pub fn baz(mut foo: Foo) {}