- InnerClasses & EnclosingMethod attributes for local classes

in multifile part members
- invocation of multifile part/facade members
(TODO: deserialized descriptor case)
- inlining of multifile part/facade members
(TODO: inline against binaries case)

compiler/testData/codegen/boxWithJava/fileClasses/multifileClassWithCrossCall/bar.kt

@@ -2,4 +2,4 @@
 @file:JvmMultifileClass
 public fun bar(): String = barx()
 
-private fun foox(): String = "O"
+public fun foox(): String = "O"

compiler/testData/codegen/boxWithJava/fileClasses/multifileClassWithCrossCall/foo.kt

@@ -2,4 +2,4 @@
 @file:JvmMultifileClass
 public fun foo(): String = foox()
 
-private fun barx(): String = "K"
+public fun barx(): String = "K"