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

compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitReference.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // SKIP_TXT
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !LANGUAGE: +NewInference
@@ -6,9 +7,9 @@ fun foo(f: () -> Unit) {}
 fun bar(): Int = 42
 fun test() {
     foo {
-        <!UNUSED_EXPRESSION!>::bar<!> // should be fine
+        ::bar // should be fine
     }
     foo {
-        <!UNUSED_LAMBDA_EXPRESSION!>{ "something" }<!> // should be fine
+        { "something" } // should be fine
     }
 }