feat: impl migrate_region and procedure_state SQL function

[killme2008]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

It's the following PR of #3236 and #3278 .

Improves:

• Fetching partition and region distribution in batch for information_schema tables.

Implements:

• migrate_region(region_id, from_peer, to_peer, [timeout]) to migrate region betweeen datanodes.
• procedure_state(procedure_id) to query procedure state.

Note: for security reasons, these two functions only can be called under the greptime catalog.

For example:

1. Query the region distribution by SQL:

select b.peer_id as datanode_id,
       a.greptime_partition_id as region_id
from information_schema.partitions a left join information_schema.greptime_region_peers b
on a.greptime_partition_id = b.region_id
where a.table_name='migration_target' order by datanode_id asc

The SQL finds the datanode peer id and region id by table name.

2. Migrate the region via:

select migrate_region(4398046511104, 1, 2)

It will return the procedure id such as 538b7476-9f79-4e50-aa9c-b1de90710839.

3. Query the procedure state via:

select procedure_state('538b7476-9f79-4e50-aa9c-b1de90710839')

It will return the procedure state in JSON

 {"status":"Done"}

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

Refer to a related PR or issue link (optional)

#2931 #3161 #2921

[codecov]

Codecov Report

Attention: 74 lines in your changes are missing coverage. Please review.

Comparison is base (41656c8) 85.28% compared to head (9068098) 85.25%.
Report is 4 commits behind head on main.

Additional details and impacted files

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+ Hits       123028   123270     +242     
- Misses      21228    21319      +91     

[fengjiachun]

LGTM

[WenyXu]

Just to confirm, is the unit of the timeout(the arguments in the migrate_region) in seconds?

[killme2008]

Just to confirm, is the unit of the timeout(the arguments in the migrate_region) in seconds?

Yes, I think seconds unit is enough.