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/timerlayer/timerlayer.go

@@ -2702,6 +2702,22 @@ func (s *TimerLayerFileInfoStore) ClearCaches() {
 	}
 }
 
+func (s *TimerLayerFileInfoStore) CountAll() (int64, error) {
+	start := timemodule.Now()
+
+	result, err := s.FileInfoStore.CountAll()
+
+	elapsed := float64(timemodule.Since(start)) / float64(timemodule.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("FileInfoStore.CountAll", success, elapsed)
+	}
+	return result, err
+}
+
 func (s *TimerLayerFileInfoStore) DeleteForPost(postID string) (string, error) {
 	start := timemodule.Now()
 
@@ -2766,6 +2782,22 @@ func (s *TimerLayerFileInfoStore) GetByPath(path string) (*model.FileInfo, error
 	return result, err
 }
 
+func (s *TimerLayerFileInfoStore) GetFilesBatchForIndexing(startTime int64, endTime int64, limit int) ([]*model.FileForIndexing, error) {
+	start := timemodule.Now()
+
+	result, err := s.FileInfoStore.GetFilesBatchForIndexing(startTime, endTime, limit)
+
+	elapsed := float64(timemodule.Since(start)) / float64(timemodule.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("FileInfoStore.GetFilesBatchForIndexing", success, elapsed)
+	}
+	return result, err
+}
+
 func (s *TimerLayerFileInfoStore) GetForPost(postID string, readFromMaster bool, includeDeleted bool, allowFromCache bool) ([]*model.FileInfo, error) {
 	start := timemodule.Now()