Implement local vertex map

[siyuan0322]

In order to mitigate the pressure of dealing with graphs with billions of vertices.

Since the global vertex map implementation saves a copy of all vertices in each partition, scale up won't help.

solution

• shuffle the edge table first and fetch the outer vertices gid from other worker
• construct the local vertex map base on the local vertices oid and outer vertices gid

sub-task

• [x] implement the arrow local vertex map
• [x] test the runnable and correctness on p2p
• [x] test on graph-view 1B large graph (string oid)