Client side throttling when running the metrics controller

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.