feat: Add sentry svc creation logic to connect with horcrux-proxy automatically

[qj0r9j0vc2]

If set sentry mode, private validator will be horcrux what is connected through horcrux-proxy.

In horcrux-proxy, it has automatic discover service logic but cosmos-operator doesn't have automatic service creation logic.

through this improvement, horcrux, horcrux-proxy, and cosmos fullnode will be connected automatically.

[allthatjazzleo]

this feature is wanted. Currently, ones need to manually create k8s services for privval connection from horcrux-proxy