batch: 3-node with table-v2

[BugenZhao]

@BugenZhao

Yesterday I have discussed with @liurenjie1024 and I thought we were going to solve the problem ("3-node olap e2e not works") in such way:

1. Let the RowSeqScanNode run in singleton, since the parallel scan from Hummock is still under development.
2. Let other executors in the OLAP plan run in MPP, so OLAP e2e test can still run in 3-node distributed mode

Is it possible?

Originally posted by @fuyufjh in #228 (comment)

[BugenZhao]

After @wyhyhyhyh 's hard work in #200, we are able to create materialized view under multi-node configuration.

However, the Insert and RowSeqScan executors still can't work correctly since we used to design them based on a shared-nothing storage (legacy Bummock). Check #308 for more details.