feat: implement delete persistent cache task in scheduler

[gaius-qi]

Description

This pull request adds an isgomock struct to various mock types across multiple files to improve the mock object structure. The most important changes include updates to mock types in different components of the project.

Updates to mock types:

• client/config/mocks/dynconfig_mock.go: Added isgomock struct to MockDynconfig and MockObserver. [1] [2]
• client/daemon/announcer/mocks/announcer_mock.go: Added isgomock struct to MockAnnouncer.
• client/daemon/objectstorage/mocks/objectstorage_mock.go: Added isgomock struct to MockObjectStorage.
• client/daemon/peer/peertask_manager_mock.go: Added isgomock struct to MockTaskManager, MockTask, and MockLogger. [1] [2] [3]
• client/daemon/peer/piece_downloader_mock.go: Added isgomock struct to MockPieceDownloader.

These changes ensure consistency and improve the maintainability of mock objects across the codebase.

Related Issue

Motivation and Context

Screenshots (if appropriate)

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 0% with 138 lines in your changes missing coverage. Please review.

Project coverage is 35.57%. Comparing base (c1ed128) to head (3e4dcc0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
scheduler/resource/persistentcache/peer_manager.go	0.00%	71 Missing ⚠️
...uler/resource/persistentcache/peer_manager_mock.go	0.00%	17 Missing ⚠️
scheduler/scheduler.go	0.00%	15 Missing ⚠️
scheduler/resource/persistentcache/task_manager.go	0.00%	12 Missing ⚠️
scheduler/resource/persistentcache/host_manager.go	0.00%	8 Missing ⚠️
...uler/resource/persistentcache/host_manager_mock.go	0.00%	8 Missing ⚠️
...uler/resource/persistentcache/task_manager_mock.go	0.00%	4 Missing ⚠️
scheduler/resource/persistentcache/resource.go	0.00%	2 Missing ⚠️
scheduler/service/service_v2.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3619      +/-   ##
==========================================
- Coverage   35.67%   35.57%   -0.11%     
==========================================
  Files         335      335              
  Lines       37294    37389      +95     
==========================================
- Hits        13305    13301       -4     
- Misses      23146    23244      +98     
- Partials      843      844       +1     

Flag	Coverage Δ
unittests	35.57% <0.00%> (-0.11%)	⬇️

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

Files with missing lines	Coverage Δ
client/config/mocks/dynconfig_mock.go	3.30% <ø> (ø)
client/daemon/announcer/mocks/announcer_mock.go	0.00% <ø> (ø)
...t/daemon/objectstorage/mocks/objectstorage_mock.go	0.00% <ø> (ø)
client/daemon/peer/peertask_manager_mock.go	38.18% <ø> (ø)
client/daemon/peer/piece_downloader_mock.go	100.00% <ø> (ø)
client/daemon/peer/piece_manager_mock.go	0.00% <ø> (ø)
client/daemon/proxy/mocks/proxy_manager_mock.go	0.00% <ø> (ø)
client/daemon/rpcserver/mocks/rpcserver_mock.go	0.00% <ø> (ø)
...lient/daemon/storage/mocks/stroage_manager_mock.go	32.65% <ø> (ø)
client/daemon/upload/mocks/upload_manager_mock.go	0.00% <ø> (ø)
... and 53 more

[chlins]

lgtm