[JS IR] Fix generating property accessors

TL;DR, before we were emitting this JS code:
  Object.defineProperty(Base.prototype, 'bar', {
    configurable: true,
    get: Base.prototype._get_bar__0_k$,
    set: Base.prototype._set_bar__a4enbm_k$
  });

Now we emit this code instead:
  Object.defineProperty(Base.prototype, 'bar', {
    configurable: true,
    get: function () {
      return this._get_bar__0_k$();
    },
    set: function (value) {
      this._set_bar__a4enbm_k$(value);
    }
  });

This fixes the issue where if we had a @JsExport'ed base class with a
public property overridden in a non-exported derived class, we couldn't
access that property from JS if we were given an instance of
the derived class.

#KT-41912 Fixed

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

@@ -6990,6 +6990,11 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/propertyOverride/checkSupertypeOrder.kt");
         }
 
+        @TestMetadata("exportedBaseClass.kt")
+        public void testExportedBaseClass() throws Exception {
+            runTest("js/js.translator/testData/box/propertyOverride/exportedBaseClass.kt");
+        }
+
         @TestMetadata("initOverrideInConstructor.kt")
         public void testInitOverrideInConstructor() throws Exception {
             runTest("js/js.translator/testData/box/propertyOverride/initOverrideInConstructor.kt");

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

@@ -6990,6 +6990,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/propertyOverride/checkSupertypeOrder.kt");
         }
 
+        @TestMetadata("exportedBaseClass.kt")
+        public void testExportedBaseClass() throws Exception {
+            runTest("js/js.translator/testData/box/propertyOverride/exportedBaseClass.kt");
+        }
+
         @TestMetadata("initOverrideInConstructor.kt")
         public void testInitOverrideInConstructor() throws Exception {
             runTest("js/js.translator/testData/box/propertyOverride/initOverrideInConstructor.kt");

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

@@ -7010,6 +7010,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/propertyOverride/checkSupertypeOrder.kt");
         }
 
+        @TestMetadata("exportedBaseClass.kt")
+        public void testExportedBaseClass() throws Exception {
+            runTest("js/js.translator/testData/box/propertyOverride/exportedBaseClass.kt");
+        }
+
         @TestMetadata("initOverrideInConstructor.kt")
         public void testInitOverrideInConstructor() throws Exception {
             runTest("js/js.translator/testData/box/propertyOverride/initOverrideInConstructor.kt");