feat: add unallocated resource into mid resource

[j4ckstraw]

implement mid-tier overcommitment in https://koordinator.sh/docs/designs/node-prediction/#mid-tier-overcommitment

Allocatable[Mid]' := min(Reclaimable[Mid], NodeAllocatable * thresholdRatio) + Unallocated[Mid] Unallocated[Mid] = max(NodeAllocatable - Allocated[Prod], 0)

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

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

[koordinator-bot[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 86.48649% with 5 lines in your changes missing coverage. Please review.

Project coverage is 66.16%. Comparing base (3784df1) to head (ff65d69). Report is 231 commits behind head on main.

Files	Patch %	Lines
...troller/noderesource/plugins/midresource/plugin.go	86.48%	4 Missing and 1 partial :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1750      +/-   ##
==========================================
+ Coverage   66.11%   66.16%   +0.04%     
==========================================
  Files         388      388              
  Lines       42425    42457      +32     
==========================================
+ Hits        28048    28090      +42     
+ Misses      12305    12298       -7     
+ Partials     2072     2069       -3     

Flag	Coverage Δ
unittests	66.16% <86.48%> (+0.04%)	:arrow_up:

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[j4ckstraw]

maybe Allocatable[Mid]' := min(Reclaimable[Mid] + Unallocated[Mid], NodeAllocatable * thresholdRatio) is better than Allocatable[Mid]' := min(Reclaimable[Mid], NodeAllocatable * thresholdRatio) + Unallocated[Mid]

[j4ckstraw]

#1762

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. This bot triages issues and PRs according to the following rules:

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[j4ckstraw]

/remove-lifecycle stale

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. This bot triages issues and PRs according to the following rules:

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[stale[bot]]

This issue has been automatically closed because it has not had recent activity. This bot triages issues and PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, the issue is closed You can:
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[j4ckstraw]

/reopen

[koordinator-bot[bot]]

@j4ckstraw: Reopened this PR.

In response to this:

/reopen

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[j4ckstraw]

/close

[koordinator-bot[bot]]

@j4ckstraw: Closed this PR.

In response to this:

/close

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