Add platformStatic annotation to main method from java

#KT-8219 Fixed

j2k/testData/fileOrElement/function/mainAndNullabilitySetting.kt

@@ -1,7 +1,7 @@
+import kotlin.platform.platformStatic
+
 // !forceNotNullTypes: false
 public object A {
-    public fun main(args: Array<String>) {
+    platformStatic public fun main(args: Array<String>) {
     }
-}
-
-fun main(args: Array<String>) = A.main(args)
+}