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/codegen/issue-81408-dllimport-thinlto-windows.rs b/src/test/codegen/issue-81408-dllimport-thinlto-windows.rs
deleted file mode 100644
index 0b6ab4f7ecb..00000000000
--- a/src/test/codegen/issue-81408-dllimport-thinlto-windows.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// compile-flags: -O -C lto=thin -C prefer-dynamic=no
-// only-windows
-// aux-build:static_dllimport_aux.rs
-
-// Test that on Windows, when performing ThinLTO, we do not mark cross-crate static items with
-// dllimport because lld does not fix the symbol names for us.
-
-extern crate static_dllimport_aux;
-
-// CHECK-LABEL: @{{.+}}CROSS_CRATE_STATIC_ITEM{{.+}} =
-// CHECK-SAME: external local_unnamed_addr global %"{{.+}}AtomicPtr
-
-pub fn main() {
-    static_dllimport_aux::memrchr();
-}