This is a clone of issue OCPBUGS-33803. The following is the description of the original issue:
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The MCO currently lays down a file at /etc/mco/internal-registry-pull-secret.json, which is extracted from the machine-os-puller SA into ControllerConfig. It is then templated down to a MachineConfig. For some reason, this SA is now being refreshed every hour or so, causing a new MachineConfig to be generated every hour. This also causes CI issues as the machineconfigpools will randomly update to a new config in the middle of a test.

More context: https://redhat-internal.slack.com/archives/C02CZNQHGN8/p1715888365021729