Synthetic properties: fixed completion and inspection for generic class

+ fixed KT-8539 No completion of generic extension function for <*> type arguments

 #KT-8539 Fixed

idea/idea-completion/testData/basic/common/extensions/StarTypeArg.kt

@@ -0,0 +1,9 @@
+class MyClass<T>
+
+fun <T> MyClass<T>.ext() = ""
+
+fun foo(t: MyClass<*>) {
+    t.<caret>
+}
+
+// EXIST: ext

idea/idea-completion/testData/basic/common/extensions/SyntheticExtensionsInGenericClass.kt

@@ -0,0 +1,10 @@
+fun foo(klass: Class<*>) {
+    klass.<caret>
+}
+
+// EXIST_JAVA_ONLY: simpleName
+// ABSENT: getSimpleName
+// EXIST_JAVA_ONLY: enclosingClass
+// ABSENT: getEnclosingClass
+// EXIST_JAVA_ONLY: annotations
+// ABSENT: getAnnotations