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, 20 deletions

diff --git a/src/test/rustdoc-ui/reference-link-reports-error-once.rs b/src/test/rustdoc-ui/reference-link-reports-error-once.rs
deleted file mode 100644
index 71bd2c522ff..00000000000
--- a/src/test/rustdoc-ui/reference-link-reports-error-once.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-#![deny(rustdoc::broken_intra_doc_links)]
-
-/// Links to [a] [link][a]
-/// And also a [third link][a]
-/// And also a [reference link][b]
-///
-/// Other links to the same target should still emit error: [ref] //~ERROR unresolved link to `ref`
-/// Duplicate [ref] //~ERROR unresolved link to `ref`
-///
-/// Other links to other targets should still emit error: [ref2] //~ERROR unresolved link to `ref2`
-/// Duplicate [ref2] //~ERROR unresolved link to `ref2`
-///
-/// [a]: ref
-//~^ ERROR unresolved link to `ref`
-/// [b]: ref2
-//~^ ERROR unresolved link to
-
-/// [ref][]
-//~^ ERROR unresolved link
-pub fn f() {}