Currently the proxy-injector skips the kube-system namespace by default in its MutatingWebhookConfiguration namespaceSelector. We should do the same for the tap-injector and the jaeger-injector, whose selectors are currently empty. Although innocuous, this is currently generating a warning, in the Google Cloud Console for example (see https://linkerd.slack.com/archives/C89RTCWJF/p1700493518265689)