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

#KT-64590 Fixed

plugins/jvm-abi-gen/testData/content/effectivelyPrivateAnnotation/annotation.kt

@@ -0,0 +1,7 @@
+package test
+
+class Outer {
+    private object Annotations {
+        annotation class EffectivelyPrivateAnnotation
+    }
+}

plugins/jvm-abi-gen/testData/content/effectivelyPrivateAnnotation/signatures.txt

@@ -0,0 +1,20 @@
+@java.lang.annotation.Retention(value=RUNTIME)
+@kotlin.Metadata
+public annotation class test/Outer$Annotations$EffectivelyPrivateAnnotation {
+    // source: 'annotation.kt'
+    private final inner class test/Outer$Annotations
+    public inner class test/Outer$Annotations$EffectivelyPrivateAnnotation
+}
+@kotlin.Metadata
+final class test/Outer$Annotations {
+    // source: 'annotation.kt'
+    private final inner class test/Outer$Annotations
+    public inner class test/Outer$Annotations$EffectivelyPrivateAnnotation
+    public final static @org.jetbrains.annotations.NotNull field INSTANCE: test.Outer$Annotations
+}
+@kotlin.Metadata
+public final class test/Outer {
+    // source: 'annotation.kt'
+    private final inner class test/Outer$Annotations
+    public method <init>(): void
+}