Adjust tests.

test/libsolidity/semanticTests/immutable/inheritance.sol

@@ -27,6 +27,7 @@ contract D is B, C {
 	}
 }
 // ====
+// requiresYulOptimizer: minimalStack
 // compileViaYul: also
 // ----
 // f() -> 4, 3, 2, 1

test/libsolidity/semanticTests/immutable/multi_creation.sol

@@ -26,6 +26,7 @@ contract C {
 	}
 }
 // ====
+// requiresYulOptimizer: full
 // compileViaYul: also
 // ----
 // f() -> 3, 7, 5