refactor(log): require destination in calls to NewLogger (#15262)

testutil/network/network.go

@@ -406,7 +406,7 @@ func New(l Logger, baseDir string, cfg Config) (*Network, error) {
 
 		logger := log.NewNopLogger()
 		if cfg.EnableLogging {
-			logger = log.NewLogger()
+			logger = log.NewLogger(os.Stdout) // TODO(mr): enable selection of log destination.
 		}
 
 		ctx.Logger = logger

testutil/sims/simulation_helpers.go

@@ -29,7 +29,7 @@ func SetupSimulation(config simtypes.Config, dirPrefix, dbName string, verbose,
 
 	var logger log.Logger
 	if verbose {
-		logger = log.NewLogger()
+		logger = log.NewLogger(os.Stdout) // TODO(mr): enable selection of log destination.
 	} else {
 		logger = log.NewNopLogger()
 	}