Add platformStatic annotation to main method from java

#KT-8219 Fixed

j2k/testData/fileOrElement/switch/emptySwitch.kt

@@ -1,5 +1,7 @@
+import kotlin.platform.platformStatic
+
 public object NonDefault {
-    public fun main(args: Array<String>) {
+    platformStatic public fun main(args: Array<String>) {
 
         val value = 3
         val valueString = ""
@@ -8,6 +10,4 @@ public object NonDefault {
         }
         println(valueString)
     }
-}
-
-fun main(args: Array<String>) = NonDefault.main(args)
+}