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, 24 deletions

diff --git a/src/test/codegen/mem-replace-direct-memcpy.rs b/src/test/codegen/mem-replace-direct-memcpy.rs
deleted file mode 100644
index e8bbf0e1bbd..00000000000
--- a/src/test/codegen/mem-replace-direct-memcpy.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-// This test ensures that `mem::replace::<T>` only ever calls `@llvm.memcpy`
-// with `size_of::<T>()` as the size, and never goes through any wrapper that
-// may e.g. multiply `size_of::<T>()` with a variable "count" (which is only
-// known to be `1` after inlining).
-
-// compile-flags: -C no-prepopulate-passes -Zinline-mir=no
-// ignore-debug: the debug assertions get in the way
-
-#![crate_type = "lib"]
-
-pub fn replace_byte(dst: &mut u8, src: u8) -> u8 {
-    std::mem::replace(dst, src)
-}
-
-// NOTE(eddyb) the `CHECK-NOT`s ensure that the only calls of `@llvm.memcpy` in
-// the entire output, are the two direct calls we want, from `ptr::replace`.
-
-// CHECK-NOT: call void @llvm.memcpy
-// CHECK: ; core::mem::replace
-// CHECK-NOT: call void @llvm.memcpy
-// CHECK: call void @llvm.memcpy.{{.+}}({{i8\*|ptr}} align 1 %{{.*}}, {{i8\*|ptr}} align 1 %{{.*}}, i{{.*}} 1, i1 false)
-// CHECK-NOT: call void @llvm.memcpy
-// CHECK: call void @llvm.memcpy.{{.+}}({{i8\*|ptr}} align 1 %{{.*}}, {{i8\*|ptr}} align 1 %{{.*}}, i{{.*}} 1, i1 false)
-// CHECK-NOT: call void @llvm.memcpy