[metasrv] refactor: organized integration test in the rust-crate style: move flight api test into metasrv/tests/

[drmingdrmer]

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Summary

[metasrv] refactor: organized integration test in the rust-crate style: move flight api test into metasrv/tests/

Changelog

• Improvement

Related Issues

• According to New testing style in Rust crate #1866

Rust-crate-style tests guide: https://matklad.github.io/2021/02/27/delete-cargo-integration-tests.html

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[dantengsky]

LGTM

[codecov-commenter]

Codecov Report

Merging #1915 (3966769) into master (46c6cc2) will decrease coverage by 0%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #1915    +/-   ##
=======================================
- Coverage      71%     70%    -1%     
=======================================
  Files         645     643     -2     
  Lines       38687   38230   -457     
=======================================
- Hits        27588   27093   -495     
- Misses      11099   11137    +38     

Impacted Files	Coverage Δ
metasrv/src/api/flight_server.rs	11% <0%> (-82%)	⬇️
metasrv/src/api/http_service.rs	14% <0%> (-62%)	⬇️
metasrv/src/api/http_service_test.rs	64% <0%> (-4%)	⬇️
common/datavalues/src/series/series_impl.rs	84% <0%> (-2%)	⬇️
metasrv/src/meta_service/network.rs	74% <0%> (+1%)	⬆️
query/src/common/mod.rs	85% <0%> (+2%)	⬆️
store/src/api/http_service_test.rs	68% <0%> (+4%)	⬆️
store/src/api/http_service.rs	76% <0%> (+61%)	⬆️

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[databend-bot]

CI Passed
Reviewer Approved
Let's Merge