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/ui/feature-gates/soft-syntax-gates-with-errors.rs b/src/test/ui/feature-gates/soft-syntax-gates-with-errors.rs
deleted file mode 100644
index 49f1cba7151..00000000000
--- a/src/test/ui/feature-gates/soft-syntax-gates-with-errors.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-// check-fail
-// This file is used to test the behavior of the early-pass syntax warnings.
-// If macro syntax is stabilized, replace with a different unstable syntax.
-
-macro a() {}
-//~^ ERROR: `macro` is experimental
-
-#[cfg(FALSE)]
-macro b() {}
-
-macro_rules! identity {
-    ($($x:tt)*) => ($($x)*);
-}
-
-identity! {
-    macro c() {}
-    //~^ ERROR: `macro` is experimental
-}
-
-#[cfg(FALSE)]
-identity! {
-    macro d() {} // No error
-}
-
-identity! {
-    #[cfg(FALSE)]
-    macro e() {}
-}
-
-fn main() {}