fix: bug in distributed wal(obkv, kafka)

[Rachelint]

Which issue does this PR close?

Closes #441

Rationale for this change

If a shard (which is mapped to region in wal) is move between nodes like this:

A --> B --> ... --> A

Then wal module in mode A can't distinguish if the shard has been moved.
This may cause a serious bug:

• the shard's wal meta information may be modify in other nodes.
• when it is moved to A(original node), A doesn't know it and think it is same as before it was moved.
• A persists the old meta information to storage and overwritten the new one which are persisted in other nodes.

What changes are included in this PR?

1. For rocksdb and obkv impls

before:

+----------+         +----------+                     
| table id |-------->|table unit|                     
+----------+         +----------+                     

now:

+----------+----------+----------+        +----------+
| region   | region   |  table   | ------>|  table   |
| version  |   id     |   id     |        |   unit   |
+----------+----------+----------+        +----------+

Before,Table unit in wal manager is only indexed by table id, so wal manager know nothing about shard id and shard version (shard are mapped to region). So where shard id and shard version of table changed, wal manager can't perceive.
Now, Table unit is indexed by region version + region id + table id, it can perceive any changes.

2. For kafka impl

before:

+----------+         +----------+                     
|region id |-------> |  region  |                     
+----------+         +----------+                     

now:

+----------+----------+          +----------+
| region   | region   |--------->|  region  |
| version  |   id     |          |          |
+----------+----------+          +----------+

Similar as above, region in kafka impl can perceive shard version now.

Are there any user-facing changes?

None.

How does this change test

Test by ut.

[chunshao90]

Please describe the solution in What changes are included in this PR?.

[chunshao90]

I don't think the current tests are sufficient to cover this bug.

[chunshao90]

The amount of code modification is large. Please tell me where is the core modified code.

[Rachelint]

Please describe the solution in What changes are included in this PR?.

Done.

[Rachelint]

I don't think the current tests are sufficient to cover this bug.

Done.

[Rachelint]

The amount of code modification is large. Please tell me where is the core modified code.

The codes in wal/src are main.

[jiacai2050]

LGTM