feat: allow manual table flush through HTTP API

[v0y4g3r]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This PR allows users to manually flush table through HTTP API.

# flush region 1 of table greptime.benchmark.tab
curl -XPOST 'localhost:4000/v1/admin/flush?catalog_name=greptime&schema_name=benchmark&table_name=tab&region=1'

# flush all regions of table greptime.benchmark.tab
curl -XPOST 'localhost:4000/v1/admin/flush?catalog_name=greptime&schema_name=benchmark&table_name=tab'

# flush all tables of table greptime.benchmark
curl -XPOST 'localhost:4000/v1/admin/flush?catalog_name=greptime&schema_name=benchmark'

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)

• Manually trigger flush/compaction through HTTP API #1087

[codecov]

Codecov Report

Merging #1184 (7caa6b0) into develop (cd8be77) will decrease coverage by 0.19%.
The diff coverage is 45.60%.

@@             Coverage Diff             @@
##           develop    #1184      +/-   ##
===========================================
- Coverage    85.21%   85.03%   -0.19%     
===========================================
  Files          484      485       +1     
  Lines        71798    71903     +105     
===========================================
- Hits         61186    61143      -43     
- Misses       10612    10760     +148     

[waynexia]

LGTM

[evenyag]

LGTM

[2547409617]

Hi guys,
I'm a newbie to github. I am very interested in this feature, but I can't find the committed code in develop branch.
Any suggestions or tips are very welcome.
Thanks.

[MichaelScofield]

Seems it's removed in #2285
Any clues? @fengjiachun