Adds additional TLS configuration parameters

[mastermanu]

• Adds ability to enable host validation to Internode/Frontend TLS configuration.
• Updates config-template.yaml to surface environment variables for both serverName and enabling of host validation.
• TCTL commands that leveraged the Go Client SDK were not setting the TLS configuration correctly on the Client, so those commands would fail against a Temporal Cluster with TLS enabled.

Tested against a private deployment