Fix plugin logging missing context fields

Fix an issue where context fields logged by server on behalf of plugins didn't contain correct name/value pairs:
- bump Logr version to add key/value methods to sugar logger
- expose factory args when configuring logging with custom target types (needed for FocalBoard to create log target adapter that converts typed fields into slices of interface{} as per plugin logging API)

app/server.go

@@ -850,7 +850,7 @@ func (s *Server) configureLogger(name string, logger *mlog.Logger, logSettings *
 		return fmt.Errorf("invalid config source for %s, %w", name, err)
 	}
 
-	if err := logger.ConfigureTargets(cfg); err != nil {
+	if err := logger.ConfigureTargets(cfg, nil); err != nil {
 		return fmt.Errorf("invalid config for %s, %w", name, err)
 	}
 	return nil