fix(workloads): aggregate restore status for instance API

[leon-ape]

Closes #10832

What this PR does

Completes the restore status aggregation path for workloads using the Instance API:

• aggregates target PVC Restore conditions into each Instance
• aggregates desired Instance Restore conditions into InstanceSet
• preserves failure-first terminal semantics
• reports Restore status even before the workload Pod/Instance exists

This restores the expected status flow:

PVC -> Instance -> InstanceSet -> Component -> Cluster

Why

The Instance/InstanceSet v2 path did not publish InstanceRestore conditions. A physical PVC restore could finish while Component and Cluster remained Restore=Unknown, leaving restore intent and protection finalizers behind.

Tests

• codex-go-test.sh ./pkg/controller/instance ./pkg/controller/instanceset2 -count=1

Dependency

This is a prerequisite for #10777. #10777 should not merge before this fix is in main.

[apecloud-bot]

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[codecov]

Codecov Report

❌ Patch coverage is 83.78378% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.80%. Comparing base (27618c3) to head (92903c7).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/instanceset2/reconciler_status.go	78.48%	12 Missing and 5 partials ⚠️
pkg/controller/instance/reconciler_status.go	89.85%	5 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10831      +/-   ##
==========================================
+ Coverage   65.66%   65.80%   +0.13%     
==========================================
  Files         510      510              
  Lines       64405    64698     +293     
==========================================
+ Hits        42294    42573     +279     
- Misses      18360    18370      +10     
- Partials     3751     3755       +4     

Flag	Coverage Δ
unittests	65.80% <83.78%> (+0.13%)	⬆️

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[leon-ape]

/approve