Psi2ir: do not generate default accessor body for expect properties

Because generateDefaultGetterBody/generateDefaultSetterBody reference
the property's backing field, which in case of extension properties
leads to an error "Unbound symbols not allowed" because extension
property cannot have a backing field.

In some way, this check is similar to the `isExpect` check in
`generatePrimaryConstructor`.

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -16377,6 +16377,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/multiplatform"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
         }
 
+        @TestMetadata("expectProperty.kt")
+        public void testExpectProperty() throws Exception {
+            runTest("compiler/testData/codegen/box/multiplatform/expectProperty.kt");
+        }
+
         @TestMetadata("optionalExpectation.kt")
         public void testOptionalExpectation() throws Exception {
             runTest("compiler/testData/codegen/box/multiplatform/optionalExpectation.kt");

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

@@ -15834,6 +15834,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/multiplatform"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
         }
 
+        @TestMetadata("expectProperty.kt")
+        public void testExpectProperty() throws Exception {
+            runTest("compiler/testData/codegen/box/multiplatform/expectProperty.kt");
+        }
+
         @TestMetadata("optionalExpectation.kt")
         public void testOptionalExpectation() throws Exception {
             runTest("compiler/testData/codegen/box/multiplatform/optionalExpectation.kt");

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

@@ -15899,6 +15899,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/multiplatform"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS, true);
         }
 
+        @TestMetadata("expectProperty.kt")
+        public void testExpectProperty() throws Exception {
+            runTest("compiler/testData/codegen/box/multiplatform/expectProperty.kt");
+        }
+
         @TestMetadata("optionalExpectation.kt")
         public void testOptionalExpectation() throws Exception {
             runTest("compiler/testData/codegen/box/multiplatform/optionalExpectation.kt");

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

@@ -9740,6 +9740,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/box/multiplatform"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.WASM, true);
         }
 
+        @TestMetadata("expectProperty.kt")
+        public void testExpectProperty() throws Exception {
+            runTest("compiler/testData/codegen/box/multiplatform/expectProperty.kt");
+        }
+
         @TestMetadata("optionalExpectation.kt")
         public void testOptionalExpectation() throws Exception {
             runTest("compiler/testData/codegen/box/multiplatform/optionalExpectation.kt");