Issue 8878: relief node os deduction error checks

[Lyndon-Li]

Fix issue #8878, relief node os deduction error checks

[CarlQLange]

Ah, sorry, I did not see your PR when I created mine (#8892); I will close mine in favour of yours.

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 6 lines in your changes missing coverage. Please review.

Project coverage is 59.56%. Comparing base (61adb2a) to head (70496b7).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/util/kube/pvc_pv.go	76.92%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8891      +/-   ##
==========================================
- Coverage   59.56%   59.56%   -0.01%     
==========================================
  Files         370      370              
  Lines       40255    40255              
==========================================
- Hits        23978    23977       -1     
  Misses      14776    14776              
- Partials     1501     1502       +1     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.