Skip lease with empty holder

[skonto]

Changes

• See https://github.com/knative/serving/issues/15238 and https://github.com/knative/serving/pull/15251#issuecomment-2133304924
• Leases don't seem to be garbage collected when tested locally (not even after 1h as stated in docs). Knative creates leases without owner refs.

/kind

Fixes #

Release Note

Docs

[knative-prow[bot]]

@skonto: The label(s) kind/<kind> cannot be applied, because the repository doesn't have them.

In response to [this](https://github.com/knative/pkg/pull/3042): > > > > ># Changes > > > >- See https://github.com/knative/serving/issues/15238 and https://github.com/knative/serving/pull/15251#issuecomment-2133304924 >- Leases don't seem to be garbage collected when tested locally (not even after 1h as stated in docs). >Knative creates leases without owner refs. > > >/kind > > >Fixes # > > > >**Release Note** > > >```release-note > >``` > >**Docs** > > >```docs > >``` > Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.73%. Comparing base (03bf3de) to head (da2e316). Report is 33 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3042 +/- ## ========================================== - Coverage 78.75% 78.73% -0.02% ========================================== Files 188 189 +1 Lines 11107 8873 -2234 ========================================== - Hits 8747 6986 -1761 + Misses 2094 1621 -473 Partials 266 266 ```

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[dprotaso]

/lgtm /approve

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, skonto

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Needs approval from an approver in each of these files: - ~~[test/OWNERS](https://github.com/knative/pkg/blob/main/test/OWNERS)~~ [dprotaso,skonto] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment