Client side throttling observed when running the metrics controller. 

1. Install an AWS cluster in mint mode
2. Enable debug log by editing cloudcredential/cluster
3. Wait for the metrics loop to run for a few times
4. Check CCO logs

// 7s consumed by metrics loop which is caused by client-side throttling 
time="2024-01-20T19:43:56Z" level=info msg="calculating metrics for all CredentialsRequests" controller=metrics
I0120 19:43:56.251278       1 request.go:629] Waited for 176.161298ms due to client-side throttling, not priority and fairness, request: GET:https://172.30.0.1:443/api/v1/namespaces/openshift-cloud-network-config-controller/secrets/cloud-credentials
I0120 19:43:56.451311       1 request.go:629] Waited for 197.182213ms due to client-side throttling, not priority and fairness, request: GET:https://172.30.0.1:443/api/v1/namespaces/openshift-cloud-network-config-controller/secrets/cloud-credentials
I0120 19:43:56.651313       1 request.go:629] Waited for 197.171082ms due to client-side throttling, not priority and fairness, request: GET:https://172.30.0.1:443/api/v1/namespaces/openshift-cloud-network-config-controller/secrets/cloud-credentials
I0120 19:43:56.850631       1 request.go:629] Waited for 195.251487ms due to client-side throttling, not priority and fairness, request: GET:https://172.30.0.1:443/api/v1/namespaces/openshift-cloud-network-config-controller/secrets/cloud-credentials
...
time="2024-01-20T19:44:03Z" level=info msg="reconcile complete" controller=metrics elapsed=7.231061324s

No client-side throttling when running the metrics controller.