ResourceClient: Exercise resource client in k8s apis tests (#93473)

pkg/storage/unified/client.go

@@ -2,6 +2,7 @@ package unified
 
 import (
 	"context"
+	"fmt"
 	"path/filepath"
 
 	infraDB "github.com/grafana/grafana/pkg/infra/db"
@@ -59,6 +60,10 @@ func ProvideUnifiedStorageClient(
 		return resource.NewLocalResourceClient(server), nil
 
 	case options.StorageTypeUnifiedGrpc:
+		if opts.Address == "" {
+			return nil, fmt.Errorf("expecting address for storage_type: %s", opts.StorageType)
+		}
+
 		// Create a connection to the gRPC server
 		conn, err := grpc.NewClient(opts.Address,
 			grpc.WithStatsHandler(otelgrpc.NewClientHandler()),