Improve Jaeger tracing documentation #59
Description
The docs in docs/TRACING.md refer to hardcoded versions of the jaeger-operator helm chart that is incompatible with more recent K8s versions.
We should cut everything from that documentation page that is not Unguard related (like the name of the jaeger-agent that has to match) and simply link to an up-to-date documentation page that explains how to install Jaeger on K8s like https://www.jaegertracing.io/docs/1.49/operator/ or similar.
We could also recommend not to use the operator, as it requires cert-manager in recent versions (which makes it more work to setup for something that will be used for local dev only anways) and just install the Jaeger helm chart using:
helm install jaeger jaegertracing/jaeger
I would also suggest getting rid of /k8s-templates/jaeger in the process.