Fix preemption when requesting 0 of a resource at nominal quota

[alculquicondor]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The existing check that prevents borrowing when preempting didn't take in consideration that a workload could explicitly request 0 for a resource in a ClusterQueue that is at or over nominal quota.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Fix check that prevents preemptions when a workload requests 0 for a resource that is at nominal or over it.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alculquicondor

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• OWNERS [alculquicondor]

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[alculquicondor]

/assign @gabesaba

[netlify]

✅ Deploy Preview for kubernetes-sigs-kueue canceled.

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[alculquicondor]

/cherry-pick release-0.7

[k8s-infra-cherrypick-robot]

@alculquicondor: once the present PR merges, I will cherry-pick it on top of release-0.7 in a new PR and assign it to you.

In response to this:

/cherry-pick release-0.7

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[mimowo]

/test pull-kueue-test-e2e-main-1-30
/test pull-kueue-test-e2e-main-1-29
Failed due to infra overload: "There are no nodes that your pod can schedule to - check your requests, tolerations, and node selectors (skip schedule deleting pod: test-pods/8b64ef07-d84a-4adf-adfa-85586cdb88f8)"

[mbobrovskyi]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: b917b52d377a76bd51341a0d7fcdd55e73c07a63

[k8s-infra-cherrypick-robot]

@alculquicondor: #2520 failed to apply on top of branch "release-0.7":

Applying: Fix preemption when requesting 0 of a resource at nominal quota
Using index info to reconstruct a base tree...
M	pkg/scheduler/preemption/preemption.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/scheduler/preemption/preemption.go
CONFLICT (content): Merge conflict in pkg/scheduler/preemption/preemption.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Fix preemption when requesting 0 of a resource at nominal quota
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-0.7

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[alculquicondor]

For future reference: The limit of 12 was not accurate, as there are only 6 units available for borrowing.