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, 15 deletions

diff --git a/src/test/rustdoc-ui/display-output.rs b/src/test/rustdoc-ui/display-output.rs
deleted file mode 100644
index ec27a9f6ba3..00000000000
--- a/src/test/rustdoc-ui/display-output.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Test that `--show-output` has an effect and `allow(unused)` can be overridden.
-
-// check-pass
-// edition:2018
-// compile-flags:--test --test-args=--show-output
-// normalize-stdout-test: "src/test/rustdoc-ui" -> "$$DIR"
-// normalize-stdout-test "finished in \d+\.\d+s" -> "finished in $$TIME"
-
-/// ```
-/// #![warn(unused)]
-/// let x = 12;
-///
-/// fn foo(x: &dyn std::fmt::Display) {}
-/// ```
-pub fn foo() {}