Added UI test case for issue #106419

Author: megakorre

tests/ui/const-generics/issue-106419-struct-with-multiple-const-params.rs

@@ -0,0 +1,12 @@
+// check-pass
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+#[derive(Clone)]
+struct Bar<const A: usize, const B: usize>
+where
+    [(); A as usize]:,
+    [(); B as usize]:,
+{}
+
+fn main() {}