fix(apps): start zero-replica stopped components

[leon-ape]

Summary

• avoid mutating the cached running InstanceSet while clearing the stop replica snapshot
• explicitly remove the controller-owned snapshot annotation from the outgoing update
• add regression coverage for starting a workload whose saved replica count is zero

Branch assessment

• main: unaffected; uses native InstanceSet spec.stop
• release-1.1: unaffected; uses native InstanceSet spec.stop
• release-1.0: affected; still uses the stop replica snapshot annotation

Testing

• focused zero-replica regression test
• full controllers/apps/component package

Fixes #10813

[apecloud-bot]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.25%. Comparing base (c55a6d5) to head (2c24fb1).

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.0   #10814      +/-   ##
===============================================
+ Coverage        54.17%   54.25%   +0.07%     
===============================================
  Files              495      495              
  Lines            55939    55945       +6     
===============================================
+ Hits             30305    30353      +48     
+ Misses           22624    22590      -34     
+ Partials          3010     3002       -8     

Flag	Coverage Δ
unittests	54.25% <100.00%> (+0.07%)	⬆️

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[leon-ape]

/approve