Mark observability TLS flags as required together
Example:
agentk --kas-address=grpc://gdk.test:8159 --token-file=token-gdk-agent1.txt --observability-cert-file=asd
Program aborted: if any flags in the group [observability-cert-file observability-key-file] are set they must all be set; missing [observability-key-file]
Relates to gitlab-org&12180.