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, 63 deletions

diff --git a/src/test/ui/consts/const-eval/ub-int-array.rs b/src/test/ui/consts/const-eval/ub-int-array.rs
deleted file mode 100644
index a68d3fb17bc..00000000000
--- a/src/test/ui/consts/const-eval/ub-int-array.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-// stderr-per-bitwidth
-//! Test the "array of int" fast path in validity checking, and in particular whether it
-//! points at the right array element.
-
-use std::mem;
-
-#[repr(C)]
-union MaybeUninit<T: Copy> {
-    uninit: (),
-    init: T,
-}
-
-const UNINIT_INT_0: [u32; 3] = unsafe {
-    [
-        MaybeUninit { uninit: () }.init,
-        //~^ ERROR evaluation of constant value failed
-        //~| uninitialized
-        1,
-        2,
-    ]
-};
-const UNINIT_INT_1: [u32; 3] = unsafe {
-    mem::transmute(
-        [
-            0u8,
-            0u8,
-            0u8,
-            0u8,
-            1u8,
-            MaybeUninit { uninit: () }.init,
-            //~^ ERROR evaluation of constant value failed
-            //~| uninitialized
-            1u8,
-            1u8,
-            2u8,
-            2u8,
-            MaybeUninit { uninit: () }.init,
-            2u8,
-        ]
-    )
-};
-const UNINIT_INT_2: [u32; 3] = unsafe {
-    mem::transmute(
-        [
-            0u8,
-            0u8,
-            0u8,
-            0u8,
-            1u8,
-            1u8,
-            1u8,
-            1u8,
-            2u8,
-            2u8,
-            2u8,
-            MaybeUninit { uninit: () }.init,
-            //~^ ERROR evaluation of constant value failed
-            //~| uninitialized
-        ]
-    )
-};
-
-fn main() {}