Description of problem:
kube-apiserver container logs have 8000+ lines of:
2021-02-10T11:27:45.625925613Z E0210 11:27:45.625568 18 fieldmanager.go:186] [SHOULD NOT HAPPEN] failed to update managedFields for /, Kind=: failed to convert new object (batch/v1beta1, Kind=CronJob) to smd typed: .spec.jobTemplate.spec.template.spec.containers[name="indexmanagement"].env: duplicate entries for key [name="POLICY_MAPPING"]

Version-Release number of selected component (if applicable):
4.7.0-0.nightly-2021-02-09-024347

How reproducible:
Always

Steps to Reproduce:
1. Install env (e.g. ipi-on-vsphere/versioned-installer-vmc7-ovn-vsphere_slave-winc-ci matrix)

2. Check kube-apiserver containers logs of all kube-apiserver pods, found:
2021-02-10T11:27:45.625925613Z E0210 11:27:45.625568 18 fieldmanager.go:186] [SHOULD NOT HAPPEN] failed to update managedFields for /, Kind=: failed to convert new object (batch/v1beta1, Kind=CronJob) to smd typed: .spec.jobTemplate.spec.template.spec.containers[name="indexmanagement"].env: duplicate entries for key [name="POLICY_MAPPING"]

$ grep "SHOULD NOT HAPPEN.POLICY_MAPPING" logs/kube-apiserver-aiyengar-shared-0902-nbsll-master-/kube-apiserver.log | wc -l
8680

Actual results:
2. oc get cronjob -A -o yaml, found below 3 cronjobs are the cause:
name: elasticsearch-im-app
namespace: openshift-logging
...
name: indexmanagement
namespace: openshift-logging
spec:
containers:

• args:
• -c
• ./delete;delete_rc=$?;./rollover;rollover_rc=$?;$(exit $delete_rc&&exit $rollover_rc)
  command:
• bash
  env:
• name: POLICY_MAPPING
  value: app
• name: MIN_AGE
  value: "43200000"
• name: PAYLOAD
  value: eyJjb25kaXRpb25zIjp7Im1heF9hZ2UiOiIzNm0iLCJtYXhfZG9jcyI6MTIyODgwMDAwLCJtYXhfc2l6ZSI6IjEyMGdiIn19
• name: POLICY_MAPPING
  value: app

name: elasticsearch-im-audit
namespace: openshift-logging
...
name: indexmanagement
namespace: openshift-logging
spec:
containers:

• args:
• -c
• ./delete;delete_rc=$?;./rollover;rollover_rc=$?;$(exit $delete_rc&&exit $rollover_rc)
  command:
• bash
  env:
• name: POLICY_MAPPING
  value: audit
• name: MIN_AGE
  value: "1209600000"
• name: PAYLOAD
  value: eyJjb25kaXRpb25zIjp7Im1heF9hZ2UiOiIyaCIsIm1heF9kb2NzIjoxMjI4ODAwMDAsIm1heF9zaXplIjoiMTIwZ2IifX0=
• name: POLICY_MAPPING
  value: audit

name: elasticsearch-im-infra
namespace: openshift-logging
...
name: indexmanagement
namespace: openshift-logging
spec:
containers:

• args:
• -c
• ./delete;delete_rc=$?;./rollover;rollover_rc=$?;$(exit $delete_rc&&exit $rollover_rc)
  command:
• bash
  env:
• name: POLICY_MAPPING
  value: infra
• name: MIN_AGE
  value: "21600000"
• name: PAYLOAD
  value: eyJjb25kaXRpb25zIjp7Im1heF9hZ2UiOiIxOG0iLCJtYXhfZG9jcyI6MTIyODgwMDAwLCJtYXhfc2l6ZSI6IjEyMGdiIn19
• name: POLICY_MAPPING
  value: infra

Expected results:
2. Should have no duplicate entries which cause such error logs.

Additional info: