hr_holidays_calendar_event_privacy: tests are failing in main 15.0 branch

[LoisRForgeFlow]

Module

hr_holidays_calendar_event_privacy

Describe the bug

Tests are failing in the 15.0 branch, likely to a recent change in odoo's hr_holidays code.

To Reproduce

Affected versions: 15.0 at least.

Steps to reproduce the behavior:
See all recent pipelines, for instance 15.0 branch last one: https://github.com/OCA/hr-holidays/actions/runs/7871142366/job/21473797702#step:8:40

Expected behavior
Tests pass

cc @grindtildeath as maintainer of the module, you may want to look into this one.

[JordiMForgeFlow]

Also referenced here: #106

[github-actions]

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