enhance: [2.5] Unify milvus version def

[congqixia]

Cherry-pick from master
pr: #40227
Related to #40216

[sre-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.90%. Comparing base (bc77bc1) to head (1887136).
Report is 2 commits behind head on 2.5.

Additional details and impacted files

@@             Coverage Diff             @@
##              2.5   #40229       +/-   ##
===========================================
+ Coverage   70.15%   80.90%   +10.75%     
===========================================
  Files         304     1418     +1114     
  Lines       28274   200188   +171914     
===========================================
+ Hits        19835   161962   +142127     
- Misses       8439    32557    +24118     
- Partials        0     5669     +5669     

Components	Coverage Δ
Client	79.28% <ø> (∅)
Core	70.15% <ø> (ø)
Go	82.82% <ø> (∅)

see 1114 files with indirect coverage changes

[tedxu]

/lgtm