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

compiler/testData/diagnostics/tests/AnonymousInitializers.kt

@@ -13,14 +13,14 @@ interface NoC {
 class WithC() {
   val x : Int = 1
   init {
-    val <!UNUSED_VARIABLE!>b<!> = x
+    val b = x
 
   }
 
   val a : Int get() = 1
 
   init {
-    val <!UNUSED_VARIABLE!>z<!> = <!UNRESOLVED_REFERENCE!>b<!>
-    val <!UNUSED_VARIABLE!>zz<!> = x
+    val z = <!UNRESOLVED_REFERENCE!>b<!>
+    val zz = x
   }
 }