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

compiler/testData/diagnostics/tests/varargs/UnaryVsVararg.kt

@@ -1,9 +1,10 @@
-fun foo1(<!UNUSED_PARAMETER!>a<!> : Int) : String = "noarg"
+// FIR_IDENTICAL
+fun foo1(a : Int) : String = "noarg"
 
-fun foo1(<!UNUSED_PARAMETER!>a<!> : Int, vararg <!UNUSED_PARAMETER!>t<!> : Int) : String = "vararg"
+fun foo1(a : Int, vararg t : Int) : String = "vararg"
 
 fun test1() {
     foo1(1)
     val a = IntArray(0)
     foo1(1, *a)
-}
+}