feat: support PromQL operations over the same metric

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This patch fixes a problem that when join on the same table(metric), operations will lead to wrong result due to qualifier ambiguity. E.g.: (sum by(host) (irate(host_cpu_seconds_total{mode!="idle"}[1m0s])) / sum by (host)((irate(host_cpu_seconds_total[1m0s])))) * 100; which calculate the CPU utilies. Before this change it will always return 1

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

All modified and coverable lines are covered by tests ✅

Comparison is base (a0a31c8) 85.61% compared to head (77b748f) 85.00%.
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3124      +/-   ##
==========================================
- Coverage   85.61%   85.00%   -0.61%     
==========================================
  Files         815      822       +7     
  Lines      133411   134415    +1004     
==========================================
+ Hits       114222   114262      +40     
- Misses      19189    20153     +964     

[killme2008]

Almostly LGTM

[killme2008]

@yuanbohan PTAL