[JS IR] Export nested objects

Companion objects are exported as ParentClass.Companion.
Companion object's members are not exposed to its parent class —
one must reference the companion object explicitly if they want to
access its members.

#KT-43783 Fixed

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrBoxJsES6TestGenerated.java

@@ -1627,6 +1627,11 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/export/exportNestedClass.kt");
         }
 
+        @TestMetadata("exportNestedObject.kt")
+        public void testExportNestedObject() throws Exception {
+            runTest("js/js.translator/testData/box/export/exportNestedObject.kt");
+        }
+
         @TestMetadata("nonIndetifierModuleName.kt")
         public void testNonIndetifierModuleName() throws Exception {
             runTest("js/js.translator/testData/box/export/nonIndetifierModuleName.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java

@@ -1627,6 +1627,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/export/exportNestedClass.kt");
         }
 
+        @TestMetadata("exportNestedObject.kt")
+        public void testExportNestedObject() throws Exception {
+            runTest("js/js.translator/testData/box/export/exportNestedObject.kt");
+        }
+
         @TestMetadata("nonIndetifierModuleName.kt")
         public void testNonIndetifierModuleName() throws Exception {
             runTest("js/js.translator/testData/box/export/nonIndetifierModuleName.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -1632,6 +1632,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/export/exportNestedClass.kt");
         }
 
+        @TestMetadata("exportNestedObject.kt")
+        public void testExportNestedObject() throws Exception {
+            runTest("js/js.translator/testData/box/export/exportNestedObject.kt");
+        }
+
         @TestMetadata("nonIndetifierModuleName.kt")
         public void testNonIndetifierModuleName() throws Exception {
             runTest("js/js.translator/testData/box/export/nonIndetifierModuleName.kt");