[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/exposed/protected.fir.kt

@@ -0,0 +1,20 @@
+open class A {
+    // protected relative to A
+    protected open class B { 
+        fun foo() {}
+    }
+    public open class C {
+        // protected relative to C, must be an error
+        protected open class D : B()
+    }
+}
+
+class E : A.C() {
+    // F has invisible grandparent class B (E does not inherit from A)
+    class F : A.C.D() {
+        init {
+            // Invoke function from invisible grandparent
+            foo() 
+        }
+    }
+}