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, 12 insertions, 0 deletions

diff --git a/tests/ui/crate-loading/missing-std.rs b/tests/ui/crate-loading/missing-std.rs
new file mode 100644
index 00000000000..400d9f6e0ba
--- /dev/null
+++ b/tests/ui/crate-loading/missing-std.rs
@@ -0,0 +1,12 @@
+// compile-flags: --target x86_64-unknown-uefi
+// needs-llvm-components: x86
+// rustc-env:CARGO=/usr/bin/cargo
+#![feature(no_core)]
+#![no_core]
+extern crate core;
+//~^ ERROR can't find crate for `core`
+//~| NOTE can't find crate
+//~| NOTE target may not be installed
+//~| HELP consider building the standard library from source with `cargo build -Zbuild-std`
+//~| HELP consider downloading the target with `rustup target add x86_64-unknown-uefi`
+fn main() {}