We don't specify

WithInsecure

with the others, and I agree that this should be done via env var instead of a default. This would prevent SpiceDB users from configuring otelgrpc with TLS. https://github.com/jzelinskie/cobrautil/blob/855a6821f7f0bb9ccbb997f2a6f854ac6ca4d0c2/otel.go#L101-L110