Add regression tests to cover Unused symbol with private anonymous object property

^KT-39454 Fixed

idea/testData/inspectionsLocal/unusedSymbol/privateProperty.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+// PROBLEM: Property "bar" is never used
+
+class Foo {
+    private val foo = object {
+        var bar<caret>: Int = 42
+    }
+}

idea/testData/inspectionsLocal/unusedSymbol/privateProperty.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+// PROBLEM: Property "bar" is never used
+
+class Foo {
+    private val foo = object {
+        var bar: Int = 42
+    }
+}

idea/testData/inspectionsLocal/unusedSymbol/privatePropertyViaGetter.kt

@@ -0,0 +1,13 @@
+// WITH_RUNTIME
+// PROBLEM: none
+
+class Foo {
+    private val foo = object {
+        var bar<caret>: Int = 42
+    }
+
+    fun baz(): Int {
+        val z = foo.bar
+        return z
+    }
+}

idea/testData/inspectionsLocal/unusedSymbol/privatePropertyViaSetter.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+// PROBLEM: none
+
+class Foo {
+    private val foo = object {
+        var bar<caret>: Int = 42
+    }
+
+    fun baz(value: Int) {
+        foo.bar = value
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java

@@ -14285,6 +14285,21 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
             runTest("idea/testData/inspectionsLocal/unusedSymbol/jsExport.kt");
         }
 
+        @TestMetadata("privateProperty.kt")
+        public void testPrivateProperty() throws Exception {
+            runTest("idea/testData/inspectionsLocal/unusedSymbol/privateProperty.kt");
+        }
+
+        @TestMetadata("privatePropertyViaGetter.kt")
+        public void testPrivatePropertyViaGetter() throws Exception {
+            runTest("idea/testData/inspectionsLocal/unusedSymbol/privatePropertyViaGetter.kt");
+        }
+
+        @TestMetadata("privatePropertyViaSetter.kt")
+        public void testPrivatePropertyViaSetter() throws Exception {
+            runTest("idea/testData/inspectionsLocal/unusedSymbol/privatePropertyViaSetter.kt");
+        }
+
         @TestMetadata("propertyOfInlineClassType.kt")
         public void testPropertyOfInlineClassType() throws Exception {
             runTest("idea/testData/inspectionsLocal/unusedSymbol/propertyOfInlineClassType.kt");