ingress: Add dynamic-config-manager enhancement

[Miciah]

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[openshift-ci]

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[frobware]

For upgrades, I assume you need to remove the unsupported override and re-enable it once the upgrade is complete. However, this raises the question: if DCM is re-enabled, does that imply the cluster may be broken from an ingress perspective until the update is complete and DCM can be disabled again? Is that going to be an acceptable stance for production clusters?

[candita]

/assign @alebedev87
/assign

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[candita]

/remove-lifecycle stale