feat: task mutex replace sync kmutex

[gaius-qi]

Description

• Task mutex replace sync kmutex.

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:

• Code compiles correctly.
• My code follows the code style of this project.
• 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.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #1000 (47fc8c6) into main (97f94cf) will increase coverage by 45.66%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           main    #1000       +/-   ##
=========================================
+ Coverage      0   45.66%   +45.66%     
=========================================
  Files         0      128      +128     
  Lines         0     9094     +9094     
=========================================
+ Hits          0     4153     +4153     
- Misses        0     4473     +4473     
- Partials      0      468      +468     

Flag	Coverage Δ
unittests	45.66% <ø> (?)

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

Impacted Files	Coverage Δ
scheduler/service/service.go	92.68% <ø> (ø)
scheduler/config/config.go	0.00% <0.00%> (ø)
pkg/ratelimiter/ratelimiter/ratelimiter.go	96.61% <0.00%> (ø)
client/daemon/transport/transport.go	59.48% <0.00%> (ø)
cdn/plugins/plugin_manager.go	96.07% <0.00%> (ø)
client/daemon/proxy/proxy_manager.go	0.00% <0.00%> (ø)
pkg/source/httpprotocol/http_source_client.go	63.00% <0.00%> (ø)
cdn/supervisor/cdn/downloader.go	48.38% <0.00%> (ø)
client/config/peerhost.go	35.29% <0.00%> (ø)
pkg/reachable/reachable.go	100.00% <0.00%> (ø)
... and 119 more