Explicit this inspection: suggest also for synthetic Java property

So #KT-22089 Fixed

idea/testData/inspectionsLocal/explicitThis/syntheticJavaProperty.1.java

@@ -0,0 +1,11 @@
+public class Foo {
+    private String s;
+
+    public String getS() {
+        return s;
+    }
+
+    public void setS(String s) {
+        this.s = s;
+    }
+}