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

compiler/testData/diagnostics/tests/controlStructures/kt799.kt

@@ -3,9 +3,9 @@
 package kt799
 
 fun test() {
-    val <!UNUSED_VARIABLE!>a<!> : Int = if (true) 6 else return // should be allowed
+    val a : Int = if (true) 6 else return // should be allowed
 
-    val <!UNUSED_VARIABLE!>b<!> = if (true) 6 else return // should be allowed
+    val b = if (true) 6 else return // should be allowed
 
     doSmth(if (true) 3 else return)
 
@@ -19,7 +19,7 @@ val b = <!RETURN_NOT_ALLOWED!>return<!> 1
 val c = doSmth(if (true) 3 else <!RETURN_NOT_ALLOWED!>return<!>)
 
 
-fun f(<!UNUSED_PARAMETER!>mi<!>: Int = if (true) 0 else <!RETURN_NOT_ALLOWED!>return<!>) {}
+fun f(mi: Int = if (true) 0 else <!RETURN_NOT_ALLOWED!>return<!>) {}
 
-fun doSmth(<!UNUSED_PARAMETER!>i<!>: Int) {
+fun doSmth(i: Int) {
 }