[isoltest] Enforcing compileViaYul to be set if test can pass via yul

test/libsolidity/semanticTests/functionCall/named_args.sol

@@ -2,5 +2,7 @@ contract test {
     function a(uint a, uint b, uint c) public returns (uint r) { r = a * 100 + b * 10 + c * 1; }
     function b() public returns (uint r) { r = a({a: 1, b: 2, c: 3}); }
 }
+// ====
+// compileViaYul: also
 // ----
 // b() -> 123