consul: add support for grpc_ca_file for tls grpc connections in cons…

…ul 1.14+

This PR adds client config to Nomad for specifying consul.grpc_ca_file

These changes combined with hashicorp/consul#15913 should
finally enable Nomad users to upgrade to Consul 1.14+ and use tls grpc connections.

client/allocrunner/consul_grpc_sock_hook.go

@@ -60,7 +60,6 @@ func newConsulGRPCSocketHook(
 	if !ok {
 		consulGRPCPort = consulGRPCFallbackPort
 	}
-	logger.Info("CONSUL GRPC DEBUG", "consulGRPCPort", consulGRPCPort)
 
 	return &consulGRPCSocketHook{
 		alloc:  alloc,
@@ -302,8 +301,6 @@ func proxyConn(ctx context.Context, logger hclog.Logger, destAddr string, conn n
 	// Close the connection when we're done with it.
 	defer conn.Close()
 
-	logger.Info("CONSUL GRPC DEBUG", "destAddr", destAddr)
-
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()