Rollup merge of #109921 - compiler-errors:dyn-star-const-static, r=eholk

Don't ICE when encountering `dyn*` in statics or consts

Since we have properly implemented `dyn*` support in CTFE (#107728), let's not ICE here anymore.

Fixes #105777

r? `@eholk`

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -553,7 +553,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
             }
 
             Rvalue::Cast(CastKind::DynStar, _, _) => {
-                unimplemented!()
+                // `dyn*` coercion is implemented for CTFE.
             }
 
             Rvalue::Cast(_, _, _) => {}