feat: add update metadata step for upgrading candidate region

[WenyXu]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Add update metadata step for upgrading candidate region

Behaviors:

Abort(non-retry):

• TableRoute or RegionRoute is not found.
  Typically, it's impossible, there is no other DDL procedure executed concurrently for the current table.

Retry:

• Failed to update TableRouteValue
• Failed to retrieve the metadata of the table.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

Refer to a related PR or issue link (optional)

#2700

[codecov]

Codecov Report

Merging #2802 (2bc4fec) into develop (102e43a) will decrease coverage by 0.36%.
Report is 3 commits behind head on develop.
The diff coverage is 92.81%.

❗ Current head 2bc4fec differs from pull request most recent head 76d83a4. Consider uploading reports for the commit 76d83a4 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2802      +/-   ##
===========================================
- Coverage    84.68%   84.32%   -0.36%     
===========================================
  Files          730      732       +2     
  Lines       113711   113997     +286     
===========================================
- Hits         96291    96132     -159     
- Misses       17420    17865     +445     

[WenyXu]

My bad, I can't reopen this PR again. Moved to #2811