Split part of adt_const_params into unsized_const_params

tests/ui/const-generics/issues/issue-73727-static-reference-array-const-param.rs

@@ -3,12 +3,12 @@
 //@ revisions: full min
 //@[full]check-pass
 
-#![cfg_attr(full, feature(adt_const_params))]
+#![cfg_attr(full, feature(adt_const_params, unsized_const_params))]
 #![cfg_attr(full, allow(incomplete_features))]
 
 fn a<const X: &'static [u32]>() {}
 //[min]~^ ERROR `&'static [u32]` is forbidden as the type of a const generic parameter
 
 fn main() {
-    a::<{&[]}>();
+    a::<{ &[] }>();
 }