feat(flow): accumlator for aggr func

[discord9]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Added several types of accumlator to store all the needed information during streaming and accumlate data in a aggr func, note that those accumlator also record counts of non null value:

• Bool accumlator, counting numbers of true and false, for functions like any, all, max(bool) and min(bool)
• SimpleNumber accumlator keep records of one single i128 for functions like count and sum for integer.
• Float accumlator store a 64bit float number and counts of pos/neg inf&nans, for sum with float number
• OrdValue accumlator store a single Value formin/max

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)

[codecov]

Codecov Report

Attention: Patch coverage is 70.92360% with 255 lines in your changes are missing coverage. Please review.

Project coverage is 85.07%. Comparing base (dbb1ce1) to head (1fe914e).
Report is 56 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3396      +/-   ##
==========================================
+ Coverage   85.04%   85.07%   +0.02%     
==========================================
  Files         893      908      +15     
  Lines      147899   151892    +3993     
==========================================
+ Hits       125781   129218    +3437     
- Misses      22118    22674     +556     

[fengjiachun]

LGTM