KT-14258 Optimize accesses to properties defined into companion

- Use direct access to property defined into companion object when
it is possible rather than always use an accessor to access the
property.
- Use direct access will speedup runtime performance.
- Avoid to generate useless accessors for companion properties.

Fix of https://youtrack.jetbrains.com/issue/KT-14258

compiler/testData/asJava/lightClasses/compilationErrors/TraitClassObjectField.java

@@ -8,8 +8,6 @@ public interface TraitClassObjectField {
         public static final java.lang.String x = "";
         private static final java.lang.String y = "";
 
-        private final java.lang.String getY() { /* compiled code */ }
-
         private Companion() { /* compiled code */ }
     }
 }