fix: update peer and task manager methods to use correct key format

[BruceAko]

Description

• Changed key formatting in LoadAll methods of peer and task managers to use a prefix with wildcard for scanning.
• Renamed LoadCorrentReplicaCount to LoadCurrentReplicaCount for consistency.
• Added test cases for handling invalid peer and task keys in respective test files.

Related Issue

#3892

Screenshot

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 63.04348% with 17 lines in your changes missing coverage. Please review.

Project coverage is 35.04%. Comparing base (324eb86) to head (4de9468).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
scheduler/resource/persistentcache/task_manager.go	77.27%	3 Missing and 2 partials ⚠️
scheduler/service/service_v2.go	0.00%	5 Missing ⚠️
...uler/resource/persistentcache/task_manager_mock.go	0.00%	4 Missing ⚠️
scheduler/resource/persistentcache/peer_manager.go	80.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3902   +/-   ##
=======================================
  Coverage   35.03%   35.04%           
=======================================
  Files         337      337           
  Lines       39343    39373   +30     
=======================================
+ Hits        13785    13799   +14     
- Misses      24658    24669   +11     
- Partials      900      905    +5     

Flag	Coverage Δ
unittests	35.04% <63.04%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
scheduler/resource/persistentcache/peer_manager.go	40.66% <80.00%> (+1.18%)	⬆️
...uler/resource/persistentcache/task_manager_mock.go	25.86% <0.00%> (ø)
scheduler/resource/persistentcache/task_manager.go	43.91% <77.27%> (+2.97%)	⬆️
scheduler/service/service_v2.go	46.29% <0.00%> (ø)

... and 2 files with indirect coverage changes

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[gaius-qi]

LGTM

[chlins]

lgtm