Lower the assume intrinsic to a MIR statement

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

@@ -679,6 +679,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
             | StatementKind::AscribeUserType(..)
             | StatementKind::Coverage(..)
             | StatementKind::CopyNonOverlapping(..)
+            | StatementKind::Assume(..)
             | StatementKind::Nop => {}
         }
     }