New J2K: correctly handle vararg annotation parameter of external Java class

#KT-31726 fixed

nj2k/testData/newJ2k/annotations/kt-31726.java

@@ -1,7 +1,12 @@
+import javaApi.SpecialExternal;
+
 //Annotation class:
 public @interface Special {
     String[] names(); //array is used
 }
 //Class with annotation:
 @Special(names = "name1")
-public class JClass {}
+public class JClass {}
+
+@SpecialExternal(names = "name1")
+public class JClass2 {}

nj2k/testData/newJ2k/annotations/kt-31726.kt

@@ -1,6 +1,11 @@
+import javaApi.SpecialExternal
+
 //Annotation class:
 annotation class Special(val names: Array<String> //array is used
 ) //Class with annotation:
 
 @Special(names = ["name1"])
-class JClass
+class JClass
+
+@SpecialExternal(names = ["name1"])
+class JClass2