Remove references to Jaeger node agent

We don't support the use of the Jaeger node agent within Maistra. Reasoning:

• Use of the node agent requires the use of a service account with elevated privileges.
• Multiple installs using node agent will collide (node agent is global to k8s cluster)

For reference:

• example yaml https://github.com/Maistra/istio-operator/blob/maistra-1.1/deploy/examples/maistra_v1_servicemeshcontrolplane_cr_full.yaml#L69
• custom service account (note, no role bindings are created for this) https://github.com/Maistra/istio-operator/blob/maistra-1.1/helm/istio/charts/tracing/templates/serviceaccount-jaeger.yaml