Revert "fix: restore shard cluster failed if the origin cluster's shards less than cluster's shards"

[wangyelei]

Reverts #10023

[apecloud-bot]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.96%. Comparing base (72a9bb7) to head (43063d3).
⚠️ Report is 1 commits behind head on release-1.0.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.0   #10024      +/-   ##
===============================================
+ Coverage        53.83%   53.96%   +0.12%     
===============================================
  Files              493      493              
  Lines            54750    54746       -4     
===============================================
+ Hits             29477    29543      +66     
+ Misses           22338    22281      -57     
+ Partials          2935     2922      -13     

Flag	Coverage Δ
unittests	53.96% <ø> (+0.12%)	⬆️

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