Add API request logging to istiod

In MAISTRA-2607 we added an option to log API requests that the operator performs. This helped us uncover an unexpectedly high number of API requests during the pruning process and the operator startup. We should add the same option to istiod and check if it performs any API requests that we're not aware of.

To enable API request logging, edit the istiod Deployment and make the following changes to container.args:

• change log level to --log_output_level=default:info
• add --logKubernetesApiRequests=true

In the istiod log, you'll see statements like:

2022-09-23T06:56:10.494347Z	info	Performing Kubernetes API request: GET https://172.30.0.1:443/api/v1/namespaces/istio-system/configmaps?fieldSelector=metadata.name%3Distio-minimal&limit=500&resourceVersion=0
2022-09-23T06:56:10.497382Z	info	Performing Kubernetes API request: GET https://172.30.0.1:443/api/v1/namespaces/istio-system/configmaps?allowWatchBookmarks=true&fieldSelector=metadata.name%3Distio-minimal&resourceVersion=37278&timeout=5m24s&timeoutSeconds=324&watch=true