It should be noted that while the code has merged in master, this will only affect new installs as far as I can tell.  Anyone that has already installed a cluster will have to make these changes manually unless this config is adopted by one operator or another.

ACK Michael, for those post-installation cases we already have this KCS[1] in place.

[1] - https://access.redhat.com/solutions/4861541

Best Regards.

VALIDATED on -
[miyadav@miyadav ~]$ oc get clusterversion
NAME      VERSION                             AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.3.0-0.nightly-2020-06-14-170647   True        False         6m15s   Cluster version is 4.3.0-0.nightly-2020-06-14-170647
[miyadav@miyadav ~]$ 


The cloudproviderRatelimit is set to false with the new installation as desired :
[miyadav@miyadav ~]$ oc get configmaps cloud-provider-config -n openshift-config -o yaml
apiVersion: v1
data:
  config: "{\n\t\"cloud\": \"AzurePublicCloud\",\n\t\"tenantId\": \"6047c7e9-b2ad-488d-a54e-dc3f6be6a7ee\",\n\t\"aadClientId\":
    \"\",\n\t\"aadClientSecret\": \"\",\n\t\"aadClientCertPath\": \"\",\n\t\"aadClientCertPassword\":
    \"\",\n\t\"useManagedIdentityExtension\": true,\n\t\"userAssignedIdentityID\":
    \"\",\n\t\"subscriptionId\": \"53b8f551-f0fc-4bea-8cba-6d1fefd54c8a\",\n\t\"resourceGroup\":
    \"miyadav-0615-8kz4v-rg\",\n\t\"location\": \"westus2\",\n\t\"vnetName\": \"miyadav-0615-8kz4v-vnet\",\n\t\"vnetResourceGroup\":
    \"miyadav-0615-8kz4v-rg\",\n\t\"subnetName\": \"miyadav-0615-8kz4v-worker-subnet\",\n\t\"securityGroupName\":
    \"miyadav-0615-8kz4v-node-nsg\",\n\t\"routeTableName\": \"miyadav-0615-8kz4v-node-routetable\",\n\t\"primaryAvailabilitySetName\":
    \"\",\n\t\"vmType\": \"\",\n\t\"primaryScaleSetName\": \"\",\n\t\"cloudProviderBackoff\":
    true,\n\t\"cloudProviderBackoffRetries\": 0,\n\t\"cloudProviderBackoffExponent\":
    0,\n\t\"cloudProviderBackoffDuration\": 6,\n\t\"cloudProviderBackoffJitter\":
    0,\n\t\"cloudProviderRateLimit\": false,\n\t\"cloudProviderRateLimitQPS\": 0,\n\t\"cloudProviderRateLimitBucket\":
    0,\n\t\"cloudProviderRateLimitQPSWrite\": 0,\n\t\"cloudProviderRateLimitBucketWrite\":
    0,\n\t\"useInstanceMetadata\": true,\n\t\"loadBalancerSku\": \"standard\",\n\t\"excludeMasterFromStandardLB\":
    null,\n\t\"disableOutboundSNAT\": null,\n\t\"maximumLoadBalancerRuleCount\": 0\n}\n"
kind: ConfigMap
metadata:
  creationTimestamp: "2020-06-15T09:52:05Z"
  name: cloud-provider-config
  namespace: openshift-config
  resourceVersion: "884"
  selfLink: /api/v1/namespaces/openshift-config/configmaps/cloud-provider-config
  uid: df0ec0aa-5b76-4915-866c-93a748a71f84

Additional Info:
Moved to VERIFIED.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:2585