bug(cpp): `VerticesBuilder::AddVertex` mixes gobal vertex IDs with local storage indices

### Describe the bug, including details regarding any error messages, version, and platform.

https://github.com/apache/incubator-graphar/blob/54601c9c76f37b13b49e3a4bd413f1f3ae99afcd/cpp/src/graphar/high-level/vertices_builder.h#L329-L347

This is related to #892

### Component(s)

C++

Start with cpp/src/graphar/high-level/vertices_builder.h at lines 329-347, then read issue #892 for related context. Trace how VerticesBuilder::AddVertex uses global vertex IDs and local storage indices; the work is done when those two kinds of values are no longer mixed.

Written by the indexing model from the issue text.