fix: improve redis get role

[kizuna-lek]

fix: #5107

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 64.88%. Comparing base (e305958) to head (a67a5a7).
Report is 27 commits behind head on main.

Files	Patch %	Lines
...g/controller/instanceset/pod_role_event_handler.go	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7206      +/-   ##
==========================================
- Coverage   64.99%   64.88%   -0.12%     
==========================================
  Files         337      337              
  Lines       41723    41728       +5     
==========================================
- Hits        27118    27075      -43     
- Misses      12247    12288      +41     
- Partials     2358     2365       +7     

Flag	Coverage Δ
unittests	64.88% <83.33%> (-0.12%)	⬇️

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.

[kizuna-lek]

/cherry-pick release-0.9

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/8979311442

[xuriwuyun]

/cherry-pick release-0.8

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/9203415680