Cluster Upgrade stalls on machine-config-pools RHOCP4

Issue

• Cluster Upgrade to OCP 4.11.27 from 4.11.12 stuck in between with the following error:

  Unable to apply 4.11.27: wait has exceeded 40 minutes for these operators: machine-config
  ClusterOperators:
  clusteroperator/machine-config is degraded because Unable to apply 4.11.27: error during syncRequiredMachineConfigPools: [timed out waiting for the condition, error pool infra is not ready, retrying. Status: (pool degraded: true total: 5, ready 5, updated: 5, unavailable: 0)]
  

• machine-config cluster operator stuck in degraded state with following error:

  extension:
    infra: 'pool is degraded because rendering fails with "": "Failed to render configuration
      for pool infra: Ignoring MC 99-infra-generated-kubelet-2 generated by older
      version 0854b1512e8e445c235252a76e42043bbfa67512 (my version: c101063bef1cc325f7596712acd879ea316201ba)"'