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

compiler/testData/diagnostics/tests/objects/kt2240.kt

@@ -1,13 +1,14 @@
+// FIR_IDENTICAL
 package a
 
 //KT-2240 Wrong overload resolution ambiguity when object literal is involved
 
 class A {}
 
-fun <T> A.foo(<!UNUSED_PARAMETER!>f<!> : T) {}
+fun <T> A.foo(f : T) {}
 
 val o = object {
     fun <T> foo(f: T) {
         A().foo(f) // Ambiguity here!
     }
-}
+}