[full-ci] experimental tags backport (#5227)

* add tags to search service resource
add tags getTags, AssignTags and UnassignTags endpoint to graph
use and prefer search event spaceOwner over executant
add tags to search report response
update libre graph api
update reva

Co-authored-by: David Christofas <dchristofas@owncloud.com>

services/search/pkg/content/basic_test.go

@@ -40,7 +40,7 @@ var _ = Describe("Basic", func() {
 			Expect(doc.MimeType).To(Equal(ri.MimeType))
 		})
 
-		/*It("adds tags", func() {
+		It("adds tags", func() {
 			for _, data := range []struct {
 				tags   string
 				expect []string
@@ -63,7 +63,7 @@ var _ = Describe("Basic", func() {
 				Expect(doc).ToNot(BeNil())
 				Expect(doc.Tags).To(Equal(data.expect))
 			}
-		})*/
+		})
 
 		It("RFC3339 mtime", func() {
 			for _, data := range []struct {