feat: initial implement for promql subquery

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Support query like avg by (job) (avg_over_time((up <= 50)[5s:5s]))

This PR only handles range and step in subquery. Other parameters are ignored.

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)

• Tracking Issue: Improve PromQL compliance #1042

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 24 lines in your changes are missing coverage. Please review.

Project coverage is 85.16%. Comparing base (f49cd0c) to head (1404d7a).
Report is 1 commits behind head on main.

❗ Current head 1404d7a differs from pull request most recent head 291133a. Consider uploading reports for the commit 291133a to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2707      +/-   ##
==========================================
- Coverage   85.41%   85.16%   -0.25%     
==========================================
  Files         932      763     -169     
  Lines      155075   122920   -32155     
==========================================
- Hits       132451   104690   -27761     
+ Misses      22624    18230    -4394     

[killme2008]

Good job! But i think we should add some test cases for this feature.

[waynexia]

Good job! But i think we should add some test cases for this feature.

Test cases in prometheus are a little complicated. I'm going to make a new sqlness interceptor for them.

[killme2008]

@waynexia Don't forget this PR. 👍

[waynexia]

@waynexia Don't forget this PR. 👍

Waiting for CeresDB/sqlness#51

[tisonkun]

@waynexia as you know the sqlness blocker is unblocked. Reminder for this issue :D

[tisonkun]

Close as stale. The changeset of this patch is small. I suppose when we'd like to pick it up, we can open a new PR.