Allow explicit configuration of TTRPC address

Previously the TTRPC address was generated as "<GRPC address>.ttrpc".
This change now allows explicit configuration of the TTRPC address, with
the default still being the old format if no value is specified.

As part of this change, a new configuration section is added for TTRPC
listener options.

Signed-off-by: Kevin Parsons <kevpar@microsoft.com>

services/server/server.go

@@ -154,6 +154,7 @@ func New(ctx context.Context, config *srvconfig.Config) (*Server, error) {
 		)
 		initContext.Events = s.events
 		initContext.Address = config.GRPC.Address
+		initContext.TTRPCAddress = config.TTRPC.Address
 
 		// load the plugin specific configuration if it is provided
 		if p.Config != nil {