[FIR] Add EXPOSED_SUPER_(CLASS/INTERFACE) checker

compiler/testData/diagnostics/tests/exposed/internalAndProtected.kt

@@ -1,4 +1,3 @@
-// FIR_IDENTICAL
 public open class A {
     protected open class B
 }
@@ -6,6 +5,6 @@ public open class A {
 public open class C : A() {
     protected open class D {
         // internal & protected(in C) <= protected(in A): Ok
-        internal open class E : A.B() 
+        internal open class E : A.B()
     }
 }