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

compiler/testData/diagnostics/testsWithStdLib/inference/kt12008.kt

@@ -1,12 +1,13 @@
+// FIR_IDENTICAL
 // FULL_JDK
 
 import java.util.*
 
-fun foo(<!UNUSED_PARAMETER!>o<!>: Optional<String>) {}
+fun foo(o: Optional<String>) {}
 
 class Test(nullable: String?) {
     private val nullableOptional = Optional.ofNullable(nullable)
     fun doIt() {
         foo(nullableOptional)
     }
-}
+}