tests: Move run-pass tests without naming conflicts to ui

src/test/ui/binding/irrefutable-slice-patterns.rs

@@ -0,0 +1,15 @@
+// run-pass
+// #47096
+
+#![feature(slice_patterns)]
+
+fn foo(s: &[i32]) -> &[i32] {
+    let &[ref xs..] = s;
+    xs
+}
+
+fn main() {
+    let x = [1, 2, 3];
+    let y = foo(&x);
+    assert_eq!(x, y);
+}