Adding bulk-indexing and improving a bit the name indexing for bleve and elasticsearch (#16704)

* Adding bulk-indexing and improving a bit the name indexing for bleve and elasticsearch

* Update services/searchengine/bleveengine/bleve.go

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Update store/sqlstore/file_info_store.go

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Update store/sqlstore/file_info_store.go

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>

* Adding tests requested in the PR review

* fixing tests

* Adding a feature flag to avoid indexing files before the feature is released

* Fixing i18n

Co-authored-by: Mario de Frutos Dieguez <mario@defrutos.org>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/retrylayer/retrylayer.go

@@ -3150,6 +3150,26 @@ func (s *RetryLayerFileInfoStore) ClearCaches() {
 
 }
 
+func (s *RetryLayerFileInfoStore) CountAll() (int64, error) {
+
+	tries := 0
+	for {
+		result, err := s.FileInfoStore.CountAll()
+		if err == nil {
+			return result, nil
+		}
+		if !isRepeatableError(err) {
+			return result, err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return result, err
+		}
+	}
+
+}
+
 func (s *RetryLayerFileInfoStore) DeleteForPost(postID string) (string, error) {
 
 	tries := 0
@@ -3230,6 +3250,26 @@ func (s *RetryLayerFileInfoStore) GetByPath(path string) (*model.FileInfo, error
 
 }
 
+func (s *RetryLayerFileInfoStore) GetFilesBatchForIndexing(startTime int64, endTime int64, limit int) ([]*model.FileForIndexing, error) {
+
+	tries := 0
+	for {
+		result, err := s.FileInfoStore.GetFilesBatchForIndexing(startTime, endTime, limit)
+		if err == nil {
+			return result, nil
+		}
+		if !isRepeatableError(err) {
+			return result, err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return result, err
+		}
+	}
+
+}
+
 func (s *RetryLayerFileInfoStore) GetForPost(postID string, readFromMaster bool, includeDeleted bool, allowFromCache bool) ([]*model.FileInfo, error) {
 
 	tries := 0