Allow to import private members if they are in the same file

#KT-7724 Fixed

compiler/testData/diagnostics/tests/imports/ImportPrivateMemberFromOtherFile.kt

@@ -0,0 +1,26 @@
+// FILE: A.kt
+
+class A {
+    private class Nested {
+        object O1
+    }
+}
+
+// FILE: B.java
+
+public class B {
+    private static class JC {
+        public static class JC1 {
+        }
+    }
+}
+
+// FILE: C.kt
+
+import A.<!INVISIBLE_REFERENCE!>Nested<!>.*
+import B.<!INVISIBLE_REFERENCE!>JC<!>.JC1
+
+fun test() {
+    <!INVISIBLE_MEMBER!>O1<!>
+    <!INACCESSIBLE_TYPE!><!INVISIBLE_MEMBER!>JC1<!>()<!>
+}