feat: make scripts table work again

[killme2008]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

The final PR to make the scripts table work again.

Main changes:

• Create scripts table in the public schema for every catalog
• Create scripts table lazily only when inserting or executing scripts by HTTP APIs.
• Create or insert scripts by the new APIs instead of table APIs.
• Changed the scripts table schema, remove gmt_created and set schema, name, engine as primary key.

todo:

• We need a hook that will be executed after table regions are all opened. The script manager will recompile and register all scripts as SQL UDF in that hook. cc @waynexia

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)

[codecov]

Codecov Report

Merging #2420 (fe703a4) into develop (542e863) will increase coverage by 0.10%.
Report is 13 commits behind head on develop.
The diff coverage is 62.84%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2420      +/-   ##
===========================================
+ Coverage    77.52%   77.63%   +0.10%     
===========================================
  Files          721      727       +6     
  Lines       113723   114386     +663     
===========================================
+ Hits         88167    88801     +634     
- Misses       25556    25585      +29     

[waynexia]

We need a hook that will be executed after table regions are all opened. The script manager will recompile and register all scripts as SQL UDF in that hook. cc @waynexia

This kind of hook isn't viable, the region is opened in datanode while recompilation happened in frontend. After discussing with @killme2008 we think we need to add a "specific initialize" interface to frontend. Only initialized database (catalog/schema) are available in that instance.

[killme2008]

@MichaelScofield PTAL

[fengjiachun]

LGTM