jvm-abi-gen: Remove effectively private classes from ABI

#KT-64590 Fixed

plugins/jvm-abi-gen/testData/compile/privateInterfaceImplementedByPublicClass/app/app.kt

@@ -0,0 +1,7 @@
+package app
+
+import lib.*
+
+fun runAppAndReturnOk(): String {
+    return Outer.Public.result()
+}

plugins/jvm-abi-gen/testData/compile/privateInterfaceImplementedByPublicClass/directives.txt

@@ -0,0 +1 @@
+// REMOVE_PRIVATE_CLASSES

plugins/jvm-abi-gen/testData/compile/privateInterfaceImplementedByPublicClass/lib/lib.kt

@@ -0,0 +1,13 @@
+package lib
+
+class Outer {
+    object Public : Private
+
+    private interface Private: Secret.EffectivelyPrivate
+
+    private object Secret {
+        interface EffectivelyPrivate {
+            fun result(): String = "OK"
+        }
+    }
+}