apis: add extension field in DeviceAllocation

[eahydra]

Signed-off-by: Joseph joseph.t.lee@outlook.com

Ⅰ. Describe what this PR does

Add extension field in DeviceAllocation to support the DeviceShare plugin in koord-scheduler to custom allocator append custom protocol via DeviceAllocation

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

Base: 67.52% // Head: 67.57% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (c4e9fb4) compared to base (7adc5f6).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1012      +/-   ##
==========================================
+ Coverage   67.52%   67.57%   +0.04%     
==========================================
  Files         249      251       +2     
  Lines       28177    28354     +177     
==========================================
+ Hits        19026    19159     +133     
- Misses       7850     7883      +33     
- Partials     1301     1312      +11     

Flag	Coverage Δ
unittests	67.57% <ø> (+0.04%)	⬆️

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

Impacted Files	Coverage Δ
pkg/koordlet/util/system/system_file.go	65.62% <0.00%> (-3.61%)	⬇️
pkg/koordlet/runtimehooks/reconciler/reconciler.go	65.88% <0.00%> (-1.18%)	⬇️
pkg/koordlet/resmanager/resmanager.go	55.03% <0.00%> (-0.87%)	⬇️
pkg/koordlet/util/system/config.go	59.57% <0.00%> (-0.85%)	⬇️
pkg/slo-controller/nodeslo/nodeslo_controller.go	45.80% <0.00%> (-0.66%)	⬇️
pkg/util/httputil/reverseproxy.go	84.30% <0.00%> (-0.54%)	⬇️
pkg/slo-controller/nodeslo/resource_strategy.go	84.51% <0.00%> (-0.10%)	⬇️
pkg/koordlet/util/system/system_resource.go	65.62% <0.00%> (ø)
pkg/koordlet/resmanager/system_config.go	70.17% <0.00%> (ø)
pkg/util/config.go	97.04% <0.00%> (+0.09%)	⬆️
... and 5 more

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[hormes]

/lgtm

[FillZpp]

/lgtm

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FillZpp

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• apis/OWNERS [FillZpp]

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[jasonliu747]

/lgtm