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, 30 deletions

diff --git a/src/test/rustdoc/decl-trailing-whitespace.rs b/src/test/rustdoc/decl-trailing-whitespace.rs
deleted file mode 100644
index e47edc13218..00000000000
--- a/src/test/rustdoc/decl-trailing-whitespace.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-// Regression test for <https://github.com/rust-lang/rust/issues/98803>.
-
-#![crate_name = "foo"]
-
-pub struct Error;
-
-// @has 'foo/trait.Write.html'
-
-pub trait Write {
-    // @snapshot 'declaration' - '//*[@class="item-decl"]//code'
-    fn poll_write(
-        self: Option<String>,
-        cx: &mut Option<String>,
-        buf: &mut [usize]
-    ) -> Option<Result<usize, Error>>;
-    fn poll_flush(
-        self: Option<String>,
-        cx: &mut Option<String>
-    ) -> Option<Result<(), Error>>;
-    fn poll_close(
-        self: Option<String>,
-        cx: &mut Option<String>,
-    ) -> Option<Result<(), Error>>;
-
-    fn poll_write_vectored(
-        self: Option<String>,
-        cx: &mut Option<String>,
-        bufs: &[usize]
-    ) -> Option<Result<usize, Error>> {}
-}