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, 66 deletions

diff --git a/src/test/ui/parser/self-param-syntactic-pass.rs b/src/test/ui/parser/self-param-syntactic-pass.rs
deleted file mode 100644
index d7bb7863c07..00000000000
--- a/src/test/ui/parser/self-param-syntactic-pass.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-// This test ensures that `self` is syntactically accepted in all places an `FnDecl` is parsed.
-// FIXME(Centril): For now closures are an exception.
-
-// check-pass
-
-fn main() {}
-
-#[cfg(FALSE)]
-fn free() {
-    fn f(self) {}
-    fn f(mut self) {}
-    fn f(&self) {}
-    fn f(&mut self) {}
-    fn f(&'a self) {}
-    fn f(&'a mut self) {}
-    fn f(self: u8) {}
-    fn f(mut self: u8) {}
-}
-
-#[cfg(FALSE)]
-extern "C" {
-    fn f(self);
-    fn f(mut self);
-    fn f(&self);
-    fn f(&mut self);
-    fn f(&'a self);
-    fn f(&'a mut self);
-    fn f(self: u8);
-    fn f(mut self: u8);
-}
-
-#[cfg(FALSE)]
-trait X {
-    fn f(self) {}
-    fn f(mut self) {}
-    fn f(&self) {}
-    fn f(&mut self) {}
-    fn f(&'a self) {}
-    fn f(&'a mut self) {}
-    fn f(self: u8) {}
-    fn f(mut self: u8) {}
-}
-
-#[cfg(FALSE)]
-impl X for Y {
-    fn f(self) {}
-    fn f(mut self) {}
-    fn f(&self) {}
-    fn f(&mut self) {}
-    fn f(&'a self) {}
-    fn f(&'a mut self) {}
-    fn f(self: u8) {}
-    fn f(mut self: u8) {}
-}
-
-#[cfg(FALSE)]
-impl X for Y {
-    type X = fn(self);
-    type X = fn(mut self);
-    type X = fn(&self);
-    type X = fn(&mut self);
-    type X = fn(&'a self);
-    type X = fn(&'a mut self);
-    type X = fn(self: u8);
-    type X = fn(mut self: u8);
-}