fix: don't check for strategy when finalize

[phantomnat]

Ⅰ. Describe what this PR does

hopefully, fix the #197

Ⅱ. Does this pull request fix one issue?

Ⅲ. Special notes for reviews

[kruise-bot]

Welcome @phantomnat! It looks like this is your first PR to openkruise/rollouts 🎉

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 43.42%. Comparing base (678d4d2) to head (367fe97).
Report is 2 commits behind head on master.

Files	Patch %	Lines
...lease/control/partitionstyle/deployment/control.go	50.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #198   +/-   ##
=======================================
  Coverage   43.41%   43.42%           
=======================================
  Files          52       52           
  Lines        5675     5679    +4     
=======================================
+ Hits         2464     2466    +2     
- Misses       2786     2787    +1     
- Partials      425      426    +1     

Flag	Coverage Δ
unittests	43.42% <50.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[veophi]

/lgtm

[zmberg]

/lgtm

[zmberg]

/approve

[kruise-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zmberg

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [zmberg]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment