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/codegen/bytecodeText/constProperty/accessorsForPrivateConstants.kt

@@ -9,9 +9,13 @@ class Foo {
     }
 
     fun foo() {
+        // Access to the property use getstatic on the backed field
         LOCAL_PRIVATE
+        // Access to the property requires an invokestatic
         OUTER_PRIVATE
     }
 }
 
-// 2 INVOKESTATIC
+// 1 INVOKESTATIC
+// 1 PUTSTATIC
+// 2 GETSTATIC