adjust the judgment logic of whether the current ordinal needs to be updated

[zybtakeit]

Ⅰ. Describe what this PR does

adjust the judgment logic of whether the current ordinal needs to be updated

Ⅱ. Does this pull request fix one issue?

fix issue:#1749

Ⅲ. Describe how to verify it

1.create a StatefulSet with ordinal and open the feature gate
2.check if the pod has been upgraded correctly

Ⅳ. Special notes for reviews

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 49.18%. Comparing base (0d0031a) to head (b91d92e).
Report is 87 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/controller/statefulset/stateful_set_utils.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1751      +/-   ##
==========================================
+ Coverage   47.91%   49.18%   +1.26%     
==========================================
  Files         162      191      +29     
  Lines       23491    19595    -3896     
==========================================
- Hits        11256     9638    -1618     
+ Misses      11014     8700    -2314     
- Partials     1221     1257      +36     

Flag	Coverage Δ
unittests	49.18% <66.66%> (+1.26%)	⬆️

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[ABNER-1]

Hi, @zybtakeit .Thank you for your contribution.

We are contemplating redefining the term 'partition' in the context of its combination with 'start ordinal' and 'reservedIds'