fix: force to set the metric type in the search request

[SimFG]

• issue: [Bug]: Fail to search when upgrading the server from 2.3.x to 2.4.x #35960
• pr: fix: fill the metric type field in the LoadMetaInfo object #35962

[mergify]

@SimFG Please associate the related pr of master to the body of your Pull Request. (eg. “pr: #”)

[mergify]

@SimFG Please associate the related issue to the body of your Pull Request. (eg. “issue: #”)

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 71.90%. Comparing base (089790a) to head (33216ba).
Report is 18 commits behind head on 2.4.

Files with missing lines	Patch %	Lines
internal/querynodev2/segments/collection.go	68.42%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #36279      +/-   ##
==========================================
- Coverage   71.91%   71.90%   -0.02%     
==========================================
  Files        1059     1060       +1     
  Lines      139495   139599     +104     
==========================================
+ Hits       100322   100377      +55     
- Misses      34892    34944      +52     
+ Partials     4281     4278       -3     

Files with missing lines	Coverage Δ
internal/querycoordv2/task/executor.go	80.90% <100.00%> (-0.34%)	⬇️
internal/querynodev2/services.go	91.72% <100.00%> (-0.29%)	⬇️
internal/querynodev2/segments/collection.go	89.10% <68.42%> (-2.87%)	⬇️

... and 33 files with indirect coverage changes

[mergify]

@SimFG E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[SimFG]

/run-cpu-e2e

[czs007]

/run-cpu-e2e

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: czs007, SimFG

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