fix(dataprotection): terminate restores for deleting components

[leon-ape]

Summary

• treat a still-observable, same-UID deleting Component as a Component-scoped restore termination signal
• fan out Component deletion only to that Component restore PVCs, including terminal PVCs
• delete only VP-owned execution/helper/target protection and the postReady Restore owned by the deleting Component
• stop postReady progression after its Component starts deleting
• preserve parent-authorized termination after target PVC protection has been handed off

This intentionally does not infer termination from a missing Component, support same-name replacement/UID takeover, scale-in, or add a Component finalizer.

Built on #10845, now merged into main.

Fixes #10755

[codecov]

Codecov Report

❌ Patch coverage is 67.55102% with 159 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.85%. Comparing base (63373ca) to head (6c861a9).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...llers/dataprotection/volumepopulator_controller.go	63.22%	100 Missing and 39 partials ⚠️
...llers/dataprotection/cluster_restore_controller.go	82.14%	13 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10846      +/-   ##
==========================================
+ Coverage   65.76%   65.85%   +0.08%     
==========================================
  Files         510      511       +1     
  Lines       64958    65470     +512     
==========================================
+ Hits        42721    43113     +392     
- Misses      18449    18528      +79     
- Partials     3788     3829      +41     

Flag	Coverage Δ
unittests	65.85% <67.55%> (+0.08%)	⬆️

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

☔ View full report in Codecov by Harness.
📢 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.