fix: [2.5] Add scalar index engine version for compatibility

[xiaocai2333]

issue: #39203

master pr: #39204

[mergify]

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[codecov]

Codecov Report

Attention: Patch coverage is 95.93023% with 7 lines in your changes missing coverage. Please review.

Project coverage is 81.06%. Comparing base (9a63383) to head (35a5fe9).
Report is 10 commits behind head on 2.5.

Files with missing lines	Patch %	Lines
internal/datacoord/index_engine_version_manager.go	88.23%	3 Missing and 1 partial ⚠️
internal/indexnode/indexnode.go	50.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.5   #39236      +/-   ##
==========================================
- Coverage   81.07%   81.06%   -0.01%     
==========================================
  Files        1394     1399       +5     
  Lines      196509   196774     +265     
==========================================
+ Hits       159313   159518     +205     
- Misses      31595    31650      +55     
- Partials     5601     5606       +5     

Components	Coverage Δ
Client	78.26% <ø> (ø)
Core	69.53% <ø> (ø)
Go	83.03% <95.93%> (-0.01%)	⬇️

Files with missing lines	Coverage Δ
internal/datacoord/index_meta.go	95.34% <100.00%> (+<0.01%)	⬆️
internal/datacoord/task_index.go	82.70% <100.00%> (+0.07%)	⬆️
internal/indexnode/indexnode_service.go	83.71% <100.00%> (+0.06%)	⬆️
internal/indexnode/task_index.go	71.87% <100.00%> (+1.32%)	⬆️
internal/indexnode/taskinfo_ops.go	81.37% <100.00%> (+0.06%)	⬆️
internal/metastore/model/segment_index.go	95.83% <100.00%> (+0.18%)	⬆️
internal/querynodev2/server.go	77.57% <100.00%> (+0.11%)	⬆️
internal/util/sessionutil/session_util.go	76.65% <100.00%> (+0.73%)	⬆️
pkg/common/common.go	77.18% <ø> (ø)
internal/indexnode/indexnode.go	77.72% <50.00%> (-0.75%)	⬇️
... and 1 more

... and 62 files with indirect coverage changes

[mergify]

@xiaocai2333 go-sdk check failed, comment rerun go-sdk can trigger the job again.

[xiaocai2333]

rerun go-sdk

[czs007]

/approve
/lgtm

[sre-ci-robot]

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