koord-scheduler: support exporting scheduler cache and queue to plugin

[eahydra]

Ⅰ. Describe what this PR does

Export the scheduler cache and scheduling queue through frameworkext.ExtendedHandle, and support some special plug-ins to meet the needs of special scenarios.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

Patch coverage: 21.42% and project coverage change: -0.13 ⚠️

Comparison is base (52fd1b7) 64.78% compared to head (4b8c28e) 64.65%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1300      +/-   ##
==========================================
- Coverage   64.78%   64.65%   -0.13%     
==========================================
  Files         317      317              
  Lines       33127    33159      +32     
==========================================
- Hits        21461    21440      -21     
- Misses      10107    10155      +48     
- Partials     1559     1564       +5     

Flag	Coverage Δ
unittests	64.65% <21.42%> (-0.13%)	⬇️

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

Impacted Files	Coverage Δ
...heduler/frameworkext/framework_extender_factory.go	77.92% <0.00%> (-6.59%)	⬇️
pkg/scheduler/frameworkext/interface.go	83.33% <ø> (ø)
pkg/scheduler/frameworkext/scheduler_adapter.go	0.00% <0.00%> (ø)
pkg/scheduler/frameworkext/framework_extender.go	65.70% <16.66%> (-1.25%)	⬇️
.../frameworkext/eventhandlers/reservation_handler.go	53.55% <55.55%> (ø)

... and 2 files with indirect coverage changes

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[saintube]

/lgtm

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

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• pkg/scheduler/OWNERS [hormes]

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