fix(export): slugify folder paths in computeExportPath

- Slugify folder paths when computing export path to match file system conventions
- Folder titles from DirPath need to be slugified before use in file paths
- This fixes the folder structure export test

pkg/registry/apis/provisioning/jobs/export/resources.go

@@ -15,6 +15,7 @@ import (
 	"github.com/grafana/grafana/apps/provisioning/pkg/repository"
 	"github.com/grafana/grafana/apps/provisioning/pkg/safepath"
 	"github.com/grafana/grafana/pkg/apimachinery/utils"
+	"github.com/grafana/grafana/pkg/infra/slugify"
 	"github.com/grafana/grafana/pkg/registry/apis/provisioning/jobs"
 	"github.com/grafana/grafana/pkg/registry/apis/provisioning/resources"
 )
@@ -357,10 +358,12 @@ func computeExportPath(basePath string, meta utils.GrafanaMetaAccessor, tree res
 		// Get the folder path from the unmanaged tree (rootFolder is empty string for unmanaged tree)
 		fid, ok := tree.DirPath(resourceFolder, "")
 		if ok && fid.Path != "" {
+			// Slugify the folder path to match file system conventions
+			slugifiedPath := slugify.Slugify(fid.Path)
 			if exportPath != "" {
-				exportPath = safepath.Join(exportPath, fid.Path)
+				exportPath = safepath.Join(exportPath, slugifiedPath)
 			} else {
-				exportPath = fid.Path
+				exportPath = slugifiedPath
 			}
 		}
 	}