Use of viper to bind flags from env vars and config files

[jackdelahunt]

Additional helpers introduced by RHOC team that could be part of the RHOAS:

• use of viper to bind flags from env vars and config files https://github.com/bf2fc6cc711aee1a0c2a/cos-tools/blob/main/rhoc/pkg/cmd/root/root.go#L56-L102