Rollup merge of #106043 - c410-f3r:moar-errors, r=petrochenkov

Move tests

r? ``@petrochenkov``

* 6470 is an ancient LLVM compilation bug
* 22375 to typeck because of https://github.com/rust-lang/rust/pull/23013

src/test/ui/issues/issue-6470.rs

@@ -1,17 +0,0 @@
-// build-pass
-#![allow(dead_code)]
-#![allow(improper_ctypes)]
-// pretty-expanded FIXME #23616
-#![allow(non_snake_case)]
-
-pub mod Bar {
-    pub struct Foo {
-        v: isize,
-    }
-
-    extern "C" {
-        pub fn foo(v: *const Foo) -> Foo;
-    }
-}
-
-pub fn main() {}

src/tools/tidy/src/ui_tests.rs

@@ -10,7 +10,7 @@ use std::path::Path;
 const ENTRY_LIMIT: usize = 1000;
 // FIXME: The following limits should be reduced eventually.
 const ROOT_ENTRY_LIMIT: usize = 939;
-const ISSUES_ENTRY_LIMIT: usize = 2040;
+const ISSUES_ENTRY_LIMIT: usize = 2020;
 
 fn check_entries(path: &Path, bad: &mut bool) {
     for dir in Walk::new(&path.join("test/ui")) {