KT-7291 Copy/paste of java declaration with preceding comment omitted does not convert it to Kotlin propertly

#KT-7291 Fixed

idea/testData/copyPaste/conversion/FileWithNoPackageStatement.java

@@ -0,0 +1,10 @@
+// this test should cause the whole file to be converted at once (with non-selected text stripped) and the main function to be generated
+package helloWorld;
+
+// sample class
+<selection>public class JavaClass {
+    public static void main(String[] args) {
+        System.out.println("Hello, world!");
+    }
+}
+</selection>