Unrolled build for #143056

Rollup merge of #143056 - fmease:mv-ace-test-out-of-gci-dir, r=BoxyUwU

Move an ACE test out of the GCI directory

In #122988, a test pertaining to `associated_const_equality` was placed into the directory meant for `generic_const_items`. Let's move it where it belongs.

While at it, I took the time to further minimize the test and to add a description. You can use 1.67.1 (as reported in #108220) to verify that I didn't butcher it. For additional context, the issue was likely fixed in #112718 (but I'm also cc'ing #140467 which further fixed things up and has more context).

I only performed quick and dirty git/GitHub archeology, so I don't have the full picture here. For one, I'm not even sure if this regression test is worth it.

Anyway, I just want it gone from the GCI dir :)

Author: rust-timer

tests/ui/associated-consts/assoc-const-eq-const_evaluatable_unchecked.rs

@@ -0,0 +1,17 @@
+// The impl of lint `const_evaluatable_unchecked` used to wrongly assume and `assert!` that
+// successfully evaluating a type-system constant that has non-region args had to be an anon const.
+// In the case below however we have a type-system assoc const (here: `<() as TraitA<T>>::K`).
+//
+// issue: <https://github.com/rust-lang/rust/issues/108220>
+//@ check-pass
+#![feature(associated_const_equality)]
+
+pub trait TraitA<T> { const K: u8 = 0; }
+pub trait TraitB<T> {}
+
+impl<T> TraitA<T> for () {}
+impl<T> TraitB<T> for () where (): TraitA<T, K = 0> {}
+
+fn check<T>() where (): TraitB<T> {}
+
+fn main() {}