[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/classObjects/ClassObjects.fir.kt

@@ -0,0 +1,43 @@
+// !DIAGNOSTICS: -DUPLICATE_CLASS_NAMES
+package Jet86
+
+class A {
+  companion object {
+    val x = 1
+  }
+  companion object {
+    val x = 1
+  }
+}
+
+class AA {
+  companion object {
+    val x = 1
+  }
+  companion object A {
+    val x = 1
+  }
+    companion object AA {
+    val x = 1
+  }
+}
+
+class B() {
+  val x = 12
+}
+
+object b {
+  companion object {
+    val x = 1
+  } // error
+}
+
+val a = A.x
+val c = B.<!UNRESOLVED_REFERENCE!>x<!>
+val d = b.<!UNRESOLVED_REFERENCE!>x<!>
+
+val s = System  // error
+fun test() {
+  System.out.println()
+  java.lang.System.out.println()
+}