feat: support 2+2 and /status/buildinfo

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

Closes #3496

What's changed and what's your intention?

When adding GreptimeDB to Grafana (v9.0) datasource using Prometheus extension, it will send two queries:

tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on docker0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
15:55:50.899080 IP 172.17.0.3.54034 > 172.17.0.1.4000: Flags [P.], seq 3048369435:3048369718, ack 3792103051, win 251, options [nop,nop,TS val 2511689527 ecr 2125370641], length 283
E..O..@.@.................m.........Yh.....
..W7~...POST /v1/prometheus/api/v1/query HTTP/1.1
Host: 172.17.0.1:4000
User-Agent: Grafana/10.2.3
Content-Length: 18
Content-Type: application/x-www-form-urlencoded
X-Datasource-Uid: c91e98f4-01ea-4ffd-890a-eef523983c78
X-Grafana-Org-Id: 1
Accept-Encoding: gzip

query=1%2B1&time=4
15:55:50.901986 IP 172.17.0.3.54034 > 172.17.0.1.4000: Flags [P.], seq 283:489, ack 229, win 250, options [nop,nop,TS val 2511689530 ecr 2125370644], length 206
E.....@.@.................n6...o....Y......
..W:~...GET /v1/prometheus/api/v1/status/buildinfo HTTP/1.1
Host: 172.17.0.1:4000
User-Agent: Grafana/10.2.3
X-Datasource-Uid: c91e98f4-01ea-4ffd-890a-eef523983c78
X-Grafana-Org-Id: 1
Accept-Encoding: gzip

This patch supports these two requests. Now GreptimeDB can be add to Grafana data source via Prometheus extension without error:

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.

[codecov]

Codecov Report

Attention: Patch coverage is 78.78788% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 85.08%. Comparing base (92a8e86) to head (90fb898).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3604      +/-   ##
==========================================
- Coverage   85.35%   85.08%   -0.27%     
==========================================
  Files         931      931              
  Lines      154611   154551      -60     
==========================================
- Hits       131961   131505     -456     
- Misses      22650    23046     +396     

[tisonkun]

Thank you!

[killme2008]

LGTM