[Test] Disable UNUSED_* diagnostics in tests which are not belong to contolFlowAnalysis suite

compiler/testData/diagnostics/tests/labels/kt591.kt

@@ -1,11 +1,11 @@
 //KT-591 Unresolved label in valid code
 
 fun test() {
-    val <!UNUSED_VARIABLE!>a<!>: (Int?).() -> Unit = a@{
+    val a: (Int?).() -> Unit = a@{
         if (this != null) {
-            val <!UNUSED_VARIABLE!>b<!>: String.() -> Unit = {
+            val b: String.() -> Unit = {
                 <!DEBUG_INFO_SMARTCAST!>this@a<!>.times(5) // a@ Unresolved
             }
         }
     }
-}
+}