9377 ReUpload Backup Results and Volume Info post BIA Plugin

[priyansh17]

Summary of Changes

• CSI plugin error messages are now appended asynchronously to ensure consistent reporting in backup results and volumeInfo, especially for environments like Azure Kubernetes with PV2 or Ultra disks.
• Handles both instant timeout scenarios (immediate customer visibility) and async error scenarios (results are appended after polling).
• The workflow error messages are appended to existing structures for reliability.
• Updates focus on reconciling plugin results and volume information, repopulating data without introducing breaking changes or new CRDs.

Fixes
#9377

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• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.

[codecov]

Codecov Report

❌ Patch coverage is 21.91781% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.90%. Comparing base (df07c39) to head (5bc53e5).

Files with missing lines	Patch %	Lines
pkg/controller/backup_operations_controller.go	26.22%	38 Missing and 7 partials ⚠️
pkg/persistence/object_store.go	0.00%	11 Missing ⚠️
pkg/cmd/server/server.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9402      +/-   ##
==========================================
- Coverage   59.98%   59.90%   -0.08%     
==========================================
  Files         384      384              
  Lines       35215    35288      +73     
==========================================
+ Hits        21125    21141      +16     
- Misses      12534    12584      +50     
- Partials     1556     1563       +7     

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