Determine if we can drop `overlay.d/21dhcp-chrony`

[jlebon]

I.e. https://github.com/openshift/os/tree/d689b37ee1c45e7e508d4d57091f30b3f22d7ac9/overlay.d/21dhcp-chrony

See the description of that overlay in https://github.com/openshift/os/tree/d689b37ee1c45e7e508d4d57091f30b3f22d7ac9/overlay.d#21dhcp-chrony.

The condition for removal described there should've been met by now.

[jlebon]

Should be covered by this test: https://github.com/coreos/fedora-coreos-config/blob/testing-devel/tests/kola/ntp/chrony/dhcp-propagation

[travier]

We likely need to update our dispatcher script to write somewhere else now.

[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale.
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Exclude this issue from closing by commenting /lifecycle frozen.

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/lifecycle stale

[jlebon]

/lifecycle frozen