[IMP] util/indirect_references: add indirect_reference for timer_timer

[xavierbol]

See odoo/upgrade#2208
See odoo/enterprise#16084

[robodoo]

Pull request status dashboard.

[KangOl]

upgradeci retry with always only timer timesheet_grid helpdesk_timesheet

[KangOl]

Please refer to the odoo/enterprise/design-themes PR (if applicable) in the commit message.
It's needed by UpgradeCI to correctly build this PR with the corresponding branches.

While UpgradeCI will also take the PR body into account, it is better to have those references in the commit message itself.

If you don't want to have notifications on the related PR each time you force push, simply don't force push and add new fixup commits that will be squashed before the r+.

_{This message is a canned response and thus may not be totally accurate.}

[KangOl]

upgradeci retry